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 0xc9a86ce2b71e99979799c821921b1a83777e873be8efc2c0f887740756f5477c. 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/775bc359-7b56-4ff2-9194-ebf8319597d5.json and https://artists.proofprofile.net/proofs/artist/775bc359-7b56-4ff2-9194-ebf8319597d5.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 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 0x5708d76d7d17112af2e9ae12495e56363adb0307e2bdf69b9dd43f5b7348e549. 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/DGA062330366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134dffdb05f2d9a9d35f13a088f995253d12677f8d5a9d98bedb90fb4989ca65. 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/DGA092429927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1669701429e6c9e0fd5037071dd33ef1669f8ae26f0e6de1e98b9ac18995fb2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062492342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157210a6fb99b2f8da20f6fb1187061fc21f05bec20f726962f916a09cbcb59c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX762427028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f628406bee76e8524762c6f70666b000c8f25b851d3239114ee67b93e7cbdd. 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/FRX202460038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8c54905f2ec4a7832bf4bfdd767efc945b5c735495c8b6fb56e09d227d9aea. 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/FRX202443605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f56de4426813eb0d67b12234e12b732dae2229bc22a968afe99dcd2cc0b5345. 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/FR59R2486780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7d11b0d88cfac10c910879cfa645c9c54637043c56fb2fe690f137728d8fa4. 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/DGA0R2301027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41450b7635cda83aaa70c4064494e888dd7e8448e79ca5d258e7a1001d0a01c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA0P2325655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636408e6ab8998a0fff07a523741eb87fb0301e73fbf13ede1872b78e4823440. 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/DGA0H2300980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cd89652659038d512e033d8bd76a9e54bdb37390eff760d1448d88c9533158. 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/DGA092352533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cee6469058eabc164638bcf1e90d5df460a36028639a717c6bb78d2f16a153b. 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/DGA082358440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb5e21597847670f137856aca83dde353fb0601db62d66da9552c10aed1904. 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/DGA052352051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ca86e17ac88487398221376e827cabcc2cd9b70e70ef5d19faa58267b7ba9. 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/DGA052309890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09518cfaf847b04a53c3ac7ac3f4af88a638ef5a45bad63aeb6feb07f2ef1bb7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKG731770907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a7810526efa6ba931a0fb5460f37a7ed2f2d0715a5f2250ce730f90b94d170. 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/HKG732203411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf994d8433803ce9c49dc0f5a17d831029741fe7aab9de447330bd6b027d08. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKG732203511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d1e263fcd9a281f89b01059bbb2ed441885babf9243a2ffb37525970eb02e7. 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/HKG732159610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995fe382c4b3aa68dd376771cc823532fff3bd03de69286c960a2c97b1294636. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG732317402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb4d56910f8abfa2893ccf71118444769d626b9e3c896444aa57e5b22b5c22c. 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/FR96X2123939.