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 0xe338224a8edf276bd41c7d94db9dd9952f8a7b39fe4201ea20bfd532d808ebad. 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/554c202f-f602-4334-b8ae-487898851c6c.json and https://artists.proofprofile.net/proofs/artist/554c202f-f602-4334-b8ae-487898851c6c.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 0x89f6a6de855b47f2b218381c05f366423c63ee5e1cdff83fcc718b698c8eb297. 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/UKXN22399895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f66c202578cdb72d83b4542566c092592e6a26593d1880cacbe2ca486e152af. 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/GBMA21980309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86523c156164c99df72f194d9d9f447ea6d6b031149840ff901ee9d43d2b514c. 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/GBMA22075084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45109ce3456e83321c7275f91f5462a9c93969d38686131a63f7f4cbc260ef47. 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/UKXN22157936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ff41eaf3f28e598529f3d47e511fa678184892f424af071ea4ab86009838e. 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/GX3Q92192387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d54f83aeb406df22a5d91ee25c246131a17c191eaa7dd9dd884dbc2d593558. 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/GX3Q92004365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266a09a41192368657aa2541901f474585911fb76f3538f7b673af6cf59cb477. 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/GX3Q92192388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f486a08840d3541ba8e17b2a9faa942c8756cc80bf69d78bc67d4392419aa9d. 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/GX3Q92192389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9f0974c00f8e6c5e40baa2405aa8931cdfbd78e6724b38cb090d76d9d91f53. 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/GX3Q92192390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef77327ec15ef5b63af23b0007bcae8db53d0ab1b2d1abe77810d5ad7be0b21e. 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/GX3Q92192391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03960aa67a86bd8ed65ac176eee559a7fe3303b62ebf8d5658602607fd5e3351. 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/GX3Q92192392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45109ce3456e83321c7275f91f5462a9c93969d38686131a63f7f4cbc260ef47. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UKXN22157936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f486a08840d3541ba8e17b2a9faa942c8756cc80bf69d78bc67d4392419aa9d. 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/GX3Q92192389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d54f83aeb406df22a5d91ee25c246131a17c191eaa7dd9dd884dbc2d593558. 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/GX3Q92004365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f486a08840d3541ba8e17b2a9faa942c8756cc80bf69d78bc67d4392419aa9d. 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/GX3Q92192389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d54f83aeb406df22a5d91ee25c246131a17c191eaa7dd9dd884dbc2d593558. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX3Q92004365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d54f83aeb406df22a5d91ee25c246131a17c191eaa7dd9dd884dbc2d593558. 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/GX3Q92004365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501dfed26d81230b1b1a991738b257dfac5ce4008ffbd0984e783e9a6b898e28. 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/GBMA22075100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289620f6bd0b3b733fee9bd8a9275db5268a687356641e602b509caead3773c9. 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/GBMA22075094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583189bc62bd2da8412c6a8daabcd2dd404b72653b94ed007175aed0cc56bd1e. 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/GBLFP1938345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c68c6b3230ddd1518585edfc6ea17de96fe81dc07649d94f56d09b87825f957. 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/GBLFP1938799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e4262774951f8a555019df8ab2270461b4adf29f3a054a7b1f1bcd6ee2de9. 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/QZK6Q2009449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf36ed95fc5d88ef5d76255ea4fcf96996c7fd72d51edc09a52536f64e365ee6. 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/QZNJW2351986.