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 0x114895f8d8ec60b55b1cd97cd89d9b9e031f297f83caef459f3a840100c55c83. 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/290e0f66-fa3d-4515-a13f-aecd9b89136b.json and https://artists.proofprofile.net/proofs/artist/290e0f66-fa3d-4515-a13f-aecd9b89136b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aston Villa (Édition 30ème anniversaire)
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 0x4936c8926f835263ac24d0aa68b6793af24d0920ec85e186a7165f35de147324. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRZ059500950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15448b0f85619be4b2d76e7eb6d4477f5c269a3ab4a874ad636f4d466dd473a6. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/BEH019800187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be2511f8ef926303ae617b440c0ba384862b265aecc123b88867eb28d4fd311. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/BEH019800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad9d6ef95f37c5a5ae11fb078cb2abeeb7597573646c844675943624808259e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR47Q0100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ab0919b6f24d806a36f134ccd6891c2673c4d5bf5df51b0125c8c62df7ce5. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR47Q0100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b09557fb38759a9b7a0e9deed8a1b500e725d7631af2bf7d8ed691cb4bdda6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR47Q0100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9a074520403e4204a4406ca50aa1e1c75d5264be03c13f35014608894131d9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR47Q0200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecb8f3f21984296c7bd9294bf60fb6ad1f8d321578ce90ec3617604256b4d97. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR47Q0200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cd0dad6ec0f0951f080a0a132f00ec259e95c7314b08d12a43fc7941e7b5aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR47Q0200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b945181476f20927e2b05dedd881b3c6503ce7038cb7790f55885e48720a29c. 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/FR47Q0502251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ecdb03989b7f5dc5fc0dbd9d6a565ce5ef445443a6f1bd9e64080e98bd0e11. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR9W12342504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d49c148c1254a28d4f9077d44ac3bf711753b66b4466b7cc8342655d94f3ae. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12342501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2093e152255342360614b4aa03a0bd019327822d213b2df4b26f76c553d470e8. 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/FR9W12342503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cedf850a2300733570eeecc9946ead04dd1ce377f3ffbe395f877db4c3b0ed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR9W12342511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ecdb03989b7f5dc5fc0dbd9d6a565ce5ef445443a6f1bd9e64080e98bd0e11. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/FR9W12342504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d49c148c1254a28d4f9077d44ac3bf711753b66b4466b7cc8342655d94f3ae. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR9W12342501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8499ae0344c0cbd87d4b75c3ea666fd23cce06a86ac1b5b430e0c4c6dc6c78cd. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR9W12342506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c3d4bd10816ec809b1d9f586e9faf9d750567487116b6cbd53700ae9779af2. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR9W12342505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0547a3be712b2deacf5a71988ec27798f8057dc47d79fb5f31fb5fcff1908b54. 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/FR9W12505210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ecfbbc2791b4ebf13705169d2cb3f6c79766adf8e3c6cd89e554dd8e4cf1d7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR9W12505212.