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 0x6c1143638fdb08ecab0ac6dda4c4fd92477f41d92ceea17f25538c29063da823. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e537ed98-b442-44f6-bb78-958bbadab9a2.json and https://artists.proofprofile.net/proofs/artist/e537ed98-b442-44f6-bb78-958bbadab9a2.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 0x260ec146757fa4370955ce52d61aec050a8f16a6f92aeebb527738e5eed37e17. 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/USHM91914742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f649dbee5352ca80f73346b296fe73cc562861f82199c0266ac8139da5e5dc1. 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/NLS241900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41123636b2ca2f266d1f8d7968cd5218bfc8148889ae0e5b4cdca2d368e0e24. 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/NLS241900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7309557cf94bb4b4406b5a75850885f6970696b985cb26e2300776c359b6ad25. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLS241900318.
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 0x509378cafd97c82ddd0140652ff01efcd5129fb1cd5d42d899f759aca6f2e6ed. 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/NLG662000686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2753846641905c5d9c57b37160034dee675090b939cd52a24046c5853f77092. 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/NLS241800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd378052619a85fc10c1aba8c76e0e790193204dc865f3034e5e13005498e8313. 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/NL2YA1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828a0b351941cf2873bc05e9335b49de7de676ba418cecd17e7119405a92852. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NL3HP2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fca707e93049367644b6200fd71386dd6d176a09aa1ba1c82ada0e88abae918. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NL3HP2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea645d226c87216fcf6c6b5e4cc4ae2896c434fb492bc9520afe3e281fc70b7. 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/NL3HP2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5083f9d4ac867d4af590e531efef4fc2ecf1928151b83a5ee8d46014e3e861. 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/NL3HP2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b4ff0ba020c8bca81c6c6c1184ab45d740a09e5661bc2f27cde7bced2699a8. 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/NL3HP2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1acb1590a418c3b04857e6a2518526171d3110cb5e4ca75cbf0d3ed91835c78. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NL3HP2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac819c1e773d90dac1c693cc3cae794c7a92aebe5be3e11e2ec323b13d4e6ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLS241800318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f83b7ca3cbf863e992502e06928bf2e8488ecde98846ff8768f9b62d888405. 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/NLG662000447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5568f26048df39718d3526f4c96a306e57ff2768b916bf6485aef3a0cc26070c. 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/TCAEC1960132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb207894516f8506b9c1c1c6710ed0653304f4582ccd78a532070d4f906b28cb. 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/TCAEC1960133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cdb8b9360a427bc20c7afee81236d68b66ad863ae0bdb5f5d8db18d18e1d16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEC1960134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a20ce313fae92d773a9dfb9e5305c86faad3363568aeab42133b62a0f6432fb. 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/TCAEC1960137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db1efc106ea8ee4b570a4cd8dc0423164bd2af4fbe6af9e4d1736055803b730. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEC1960140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e1a4958d1e1c55cd77c29f5bed621c8dba51e537eef3943fad6473312b4ba5. 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/TCAEC1960145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c92bef10c69da50d51f0704d31ad3e8904b96f86b9e76cbd34d9cd7b1777c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEC1960146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ddec285b989464f548f4f263300f2f3a8ce4ed3a09aece2fced3b4c27de5dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEC1960149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196e3675c86f87416b6bdd40e71edaaeb739a82b4f449c0d518f95803d942bd5. 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/TCAEC1960150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872d7c3f7d53df1fa0eb0520dfbdef9ffeb652a4eb60db490dda6ae41efd4639. 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/TCAEC1960152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040874542fd05032446b145758b67c5cd43ccbc91371ce41e7a3336e9e8a198f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEC1960157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4b79de4af4f2b4fd0574d4aafa8fe2c07f0c96df66f0cc0435a344bffc75ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEC1960162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190a5bad77bb728ba6ea0f08914eebfb3135d2c29be5aec850cf2f183e2db6a8. 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/NLG662000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862fe72e471b2642f3d370a42e07c0bd1b6feebaabf149f420d65b8ae269ebb6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLG662000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26fa49c0d9f3bbd9a90afabd131b2a3b4001d76bfa289031299d5dcc908dab7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLG662000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3d0184f59a3d3d4fd1bc890456efc47f82e60fe8070a3231b9bbc13af47411. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLG662000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e1d27559a35007aad0fd6fb5cebe785f61572d707341bf6340a9bc647579e8. 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/NLG662000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9f3331806f2aa796456bf291238f5c010493f303a8ff415bda9d82fa2059fe. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLG662000155.