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 0x152dabad266e76dff69c62c9f5a8c806c734b982e12b354137ced642f0e81ce1. 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/9dc1d845-ac72-439c-825c-6378343b2390.json and https://artists.proofprofile.net/proofs/artist/9dc1d845-ac72-439c-825c-6378343b2390.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 0x10f9df19ba69f4aff53f428f1d134bc50efcaec7fd072c1cb6604ff811e8cd6b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR6V82187689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a8ddc63ca116f5b76894c7d9d60940289e52a77eb978f8460017500eddf06. 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/FR6V82699065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ec9cfe04227b6458c471befac2f59e8aaf83fed6c7b12d312cddc4138e19bf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR6V82699068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809adf418f359234e9d0795194e07287f7bcf0845f467c1eeecd764b2f27fbf5. 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/FR2X41671430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973f126fcbd5a38664ea40e2eb5db6696f590d39b07d7ec8125e9ae2764c3445. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR9W11607826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bfb9aa029a6ef1a016f355ad0d43302c21b662444a1096e1822eeaae2a0bfb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR9W11607828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914e6cee9e23f2ea9738b58af6fefa78cacb906caca1e95467ecfae124a68a50. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR9W11607829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764e632f9b35eb3b1b009383dad345d028d5b39d57d36afd4b80801ec0d905c2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR9W11607832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e020492be44c13d5f930da7f12065999164c72fd01bd5e2ad1f8c246b29c04. 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/FR9W11607833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0335f60707715e318149c55f86b6248b3a1ad09268e410e32610e4881792a757. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W11817080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2369c810b6eeda4e8ebaadcf5e7f97499f16fdec969bebc0d4c5b72c7ddeeda1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W11817085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab95709d3e1fd092819a949fb89f91e3989b943b7cab2f1011f72e93fbea783. 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/FR9W11817084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5353520b527f23aab9ace24f8adf7bdc3bac0633fdad6cee626f68cb54727c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W11817078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0603ec926ec70e9e4b088422d7d644c0ddbf98f93b0b65a7322c426bdb7ca2. 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/FR9W11817087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92629febd391774100a5e1cb23ef1367649c2b3c8587792cfc46396f93bcf69. 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/FR9W11817079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70587bb47f56bd111f628ff7e667fb4282d5a1c8b844cc01879c51ab646febab. 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/FRY602011259.
Du sang sur les congas - Extended version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3b21d302ac218619ca4d0da603730501b783a9d4b82a436c1a2ce7c78581c3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR7GN2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca23443b44113a8d34a314705aef587911d05abc64d1797eac0a65ea95dc2155. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR7GN2100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e03894109f22fa2d9df4d01ec78bba3d4b2318a691e4bc5f5db0f8fd4be82a2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FRR642200800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c44bd0fb876c4f2942bd7c234efaefb8cfaef903fb8e4e5b1e5b50d0259acc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7GN2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e4c7ee40bb978ff5e71defddd8ddc452cc1a4a6a085c84b14994043160ea0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR7GN2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b8376c6abccda1a0a33ea8eec859551366781a75a5d20e82b8b6f6e5c540c1. 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/FR7GN2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658086950c5d4cb0f8ac04e61f91523c15cd6fb24b0bd5c547efd58c831e2d8f. 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/FR7GN2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78645eaaf6dc09b28d594f6b725837166d28d1fcb092c072280b87951b3e6a56. 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/FR7GN2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e4c7ee40bb978ff5e71defddd8ddc452cc1a4a6a085c84b14994043160ea0. 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/FR7GN2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c349abe05620624c2c36181a68fae4e7bf2d8c2491b9bc66a600ceffcadd8a8. 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/FR7GN2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6c1bdff2a0bb0aca0f137005fd6d19460aa60ac01596c66700da8904fef627. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR7GN2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c44bd0fb876c4f2942bd7c234efaefb8cfaef903fb8e4e5b1e5b50d0259acc. 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/FR7GN2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d71c2d4b4e1a91b750f483d6db48121879d6428da47e5d70c30922f7583bfc0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR7GN2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e010da8a95fa2ffd5cc5736858cfe9084bc2d4a522fff1e9568e031bf15dbf. 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/FR7GN2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92878c69b9f4efac800ae6b23f09cae8039d36de51957d3abc08a7e94ebf929c. 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/FR7GN2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05bb96df4c181e892d8daa0bd073c386e2c2239f58e5e21f6f7c134d64d8a88. 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/FR7GN2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31b9d8860804c349aea61602432b2dff27f687ec8a4d71346c14eea9a657c5. 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/FRX201767760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937a4557c0e8c186d9b3bf474d94061984c741179aedf21e4198558f446b50a0. 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/FR7GN1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf6db155e428eed6852662d6b5a51e826fd61726dbc06096163d6e38eb90cd5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR7Q31700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ad4aae283368bdce181d1cca986a66cdd540a1eba2b1cebaf3b565d722b94. 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/FR59R1900752.