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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4deeca1be89bdba625686d75a3bf67e75ea67b2b2e63c21d6010c8156c97a5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb849038-d79c-4e63-aa66-3c2c722c9b14.json and https://artists.proofprofile.net/proofs/artist/fb849038-d79c-4e63-aa66-3c2c722c9b14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb0930fc4002a5833288f0be0af018e17183275b97ad66e787d49851140fbc6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6M2464188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5533e799c42f8afec5a67a851bb0ae09e090c7bc17ba8c8aea63444969adbb0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZMEM2404882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b912dfe2c016537825ba6fc6092510c2e93232743a8465333142f651a9f2bc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2432468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493e200e4164963e3ece3396ff7ca8a07384dd10d0db4897db58a0bc133a611. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:23:48Z), 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/QZNWX2401671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705dd1df7b8522955ba52fb98e8e9bd170f78d2da9ca8c6173f3830fef952ba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2494252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fdbb043fa4cadc92d79655f3b4427ccef72f6a076ad78e5eeb823343108325. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:24Z), 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/QZNWZ2443768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc635c80699928d3a8b263227ebd6d77910cce1f964cf24c027056473d3afd0e. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZNWZ2443769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f06013536cdce853657b3c6df2a9da432675da39ace6d6ec58db84d86fd5e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:50:33Z), 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/QZRP42424459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed7db1da57e757529a7c86d38033c87180ffd2c79109bb3e5756aaf1caf9c90. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAZ2404928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113d107f9297db721393f72c33cbc45ceb05620b442afc3e5dc59ef4c3d6f626. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB82409526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4d5ba3f3019a3ee44c71bf9a2cb2a64439eae2bc9c42ba2d7c1ff76b13bfac. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZWFJ2466011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8837f81c5e74022be2d02147429dec516637e42e14468a488aa3184cf4da931. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFJ2466012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edfc4879d29ba95044b18cdf54db3fb2ca064e4e2fc552e7047fd4c502f1d2b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:51:44Z), 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/QZWFJ2466013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53babf0903a96c000cb1951925129cc53ab11554c988188d8d865f582358a1b8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFJ2466014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82870f01929a44be5dfcecb896df91c64eb07ad9ba287a4e9b01fe29c4ee05d6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFJ2466015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26448c4a90bf7f5edf59177c70303cd2be899464d3ea61dd70a153de2bebee3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:41Z), 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/QZWFJ2466018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6eb5b398d4613aa04624da73ec38019d02fb2dc44e80f266416f3668bf5f28. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZWFJ2466025.