1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114be6e3750fc2da05cf25177d716357b2a2e31d237d166fac454e7000d0b5f1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79db4f03-f125-425d-81fb-c69eb26b8ca6.json and https://artists.proofprofile.net/proofs/artist/79db4f03-f125-425d-81fb-c69eb26b8ca6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Unter Schafen Records Compilation, Vol. 2
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df452d2bdff7996dd2988644c3dbd420cb28dd6c495e86ee2ebafa408110cbb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271300269.
Unter Schafen Records Compilation, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7428f070aee9656ee9b363c137268a36ca0f5e98514420ba91c6dc6c863030c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaa393d717c807c5b0682a0618960eccad2fb488fabffa46679edffeef3dd43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25789ea5a4e4b60d8828df92e73765e60d7c70bbcdfe092232d8ee841b56c892. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993c71023269cdcdeacfce4a8f498fed8de56d2b289e1ee35c392e85d937738. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de2aaff1f0f25658142ae99d5cab15d620fdfb6c743c843edadf17aded93167. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457de442b4891cecfe7670520eabd37132c8ae9d86d23bc0c80d7ef127d9341a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7d8c8bb012567d8b4e9c7cd6477fff7bae52defb12027c5ca573fd43c0ab0f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52296026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb2744d0e76a81ac09a3a6e397e8dec21bfec534133e5e3df164efa47f20578. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52296028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f78c873237f7bfcb9a7b932577fed4b7961a61558205ec9532c6c21f07e2d93. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274021828a12345ad8bdbef3fdcc06ad8cdb5d4077c90f5c1021e2f3e37e5bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71402719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddebf7ba27202cd6a5eb6d6de7bc6e2ecad2b277adbeae488f914c07244c1c8c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFS41501253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eea36c6fea90faecdf0c26e4d6e5cac3876dd6c1e1f5596fc1c229e80b09a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ321500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf1534d55773f2ed154f98be03c674aa4feacd90906e8e1169b6c3d274a5318. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAK81300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda8b2b9b7995e53db88affd849bc98d030a9b38a4b7999cd128502ca9971962. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELK21200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2dabaf627d1634da0e3d61863816ca76a191283343b22a3e1c52c6f55a2b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE881512001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb79015198c32b1605e54e2ace4bc1faaabbda42f2cb8b67b6656a9c4c2e0973. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71404030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0534f3b5c1f7037570badadf113e5c19ae10e0233b3874ef6dd4081f3a599. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ321300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e8c6a76c78355b794ccfc9caf83a67bd015dda9156f33f300ac99cc83cab8e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ321200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457de442b4891cecfe7670520eabd37132c8ae9d86d23bc0c80d7ef127d9341a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f97d51a582bcfe3d1bb853fdac6117045dc1a343f1d7f87729ad354963ce083. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEOV41400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264d234a66d51b96165c57fc7d0bd4d906ea9b372b8529c47f95a2a99ed8fe6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271303499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8a5c80f0c83645168179c71829101627162dbbdb1274df805a9d2da78c15bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG441490595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf827a51d581e0967de0e0682a2755e8638c8b26fc686172bb446edd6309153d5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ321500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba4250d8693f06a58e7641f5e101e224e74d837524484f584d6d41fce1bb987. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE021501410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1afd85052adcccc6238f9726be17a1aad100f4b8cf6337bebcbf123dd34f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71503133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4891c40d85fd418f78833cd714eb2af496339c156033773015e227678cea8a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ1400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb899c191923b0f229e4418ee06a1d64fe00c53bd943a920ca67add3f39a9b9bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAK81400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07c6095b30685fd2fa759388773c5cc528192f397029ba732d812c75a4cc028. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEBT91500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8431fbdca137d2a61a422ebc7b101e1d46dc32744148a95265da8475d9890389. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ321300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634bbd181c2d09523000592b81b1b3021779243e9d74ec3ae2695953c7395628. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71401082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c7fb354ef880bdf506747e102b17f0725c95987f154bf9056d39ecbc690aca. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271300271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35316296001e860d72966560c652551bbe68082e15177abc64f6f432452eaf2a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW271303664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb41be4d7f02dfc8cde375cdf04aca8b5300460a51c3b14d337f08df2ff0f2f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DETA81500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05bd7ef3f64d67cffa84154f07dad52f7d5d9bfcae624af4a92e0e00d5612df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX761553499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd111985e347cff3449072d89e5704a8694e1a4d448b85144b02a4fd386daf21c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU161503171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e017bd4b7cc7cecf17c99320b63a9561fa382025e8635e83a8b81f0615b3b1. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFS41301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24762b0a9b90a26cb60619d88ed3e98032445eb6b8c021eac88a98f8f02b266. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DETQ91400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa528fddcec26ce65ee3cd13be7649dcf936d1eb3adc824515954e9ea368b6f11. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ1500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d5ca202af7fb2919c01f69399872a886e68cc60f98db257cee1c6edfd33f13. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN771300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6025d900d3b0bba94ff37415b0204c5140f1770fd2e9bca602362322d2666b07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71403568.