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 0xcf51408272a4790cb61c4088405159d89a189e4d2421e9ac58b9d9dd7df56fdf. 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/b379c195-e9c9-490f-b888-50f86514a74d.json and https://artists.proofprofile.net/proofs/artist/b379c195-e9c9-490f-b888-50f86514a74d.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 0x81bfe89e1fc82bd25eb883be1952994b9ac25e333349af88f29e34370fc1284d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACX1780049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f70b4507bb98043c7fae5c74aaa1dde3c940ab212872a11e4641e2ddcf27499. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:18:47Z), 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/GBKPL1782396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e0c9601cf29e56102d1f1bc084c68fba48766cfbad134abc35f6978c7f52a0. 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/GBKPL1800397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d08482c31090e19a1c72803d935112a1fb3aa9e685d4c60f31ee377806e381f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:46Z), 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/GBKPL1783778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0042c3bd06bb0b11b10ee52161cd164127e349f19ca2e8292844488bcbf43e. 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/GBKPL1831663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113532d9c0fdf39740c29fc7a020f8101943892398d106ab249ed7de3577b187. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:16Z), 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/GBKPL1962452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858979e1263cac7e4cd07bd6d4f6b1e2a8a0a4fbbbaab68c0a9a7d7900f69d1f. 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/GBKPL2099063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfc5bb3936cbb8c37178b23ae612d2144ddb55d47bb8b8132718b69d9fc5c20. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKPL2025533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c9dcaa129b1189d4fabed44b55620991180c0dd884396e928f820f8a3a2b5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMFMF2004221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2338dacd35f8f95447ce0cf967b5a0916a4e79ffd82b9c9200e109c001b80cf0. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:54:35Z), 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/QZLBC2321595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4796af9b7bccc6a7532c195aa10c2424fc8d286d2fd75638435a031d546a9d15. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZLBC2200989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0807da0238b7172346557b7bf81a7fcf7c2039cec26ac91def96a139aafef796. 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/QZLBC2321596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900b910ec17f4ceffed5ebccecaabb1027ceb160fd80f5ef52421a6bb4b3c60. 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/QZLBC2315925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77930b1854ca559a0a3375dda696e84f721c58d64a4d6f7bf5710b06d6b4370. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZLBC2321597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c7b537efd4e2ba49daed44c0575cc0cce5e878102d1e5171ef1aba944e91d5. 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/NLF712006259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe0ecde007c0b5cb71cdcf4d211ecefbb3c7a5ce488ca6cc2432c358c6921d. 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/NLZ542100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd812e611b22cf920cdf013017d089669d0112afa85fce7233d897662a2d48a32. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFXH1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98505eb453c35a29d20616eb7a2e8851cb9bac4109819bc182b472b54be712d7. 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/QMFXH1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9921f2e2aa5c406b85dfaeed82567e7a96254cb4d609c6eac40f353c02e468. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMFXH1800003.
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