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 0xb3dd66e9ee9835958a4aa0d2c4cb90e22ac7d80c6b1835ccda14260dd8d53843. 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/cff2e150-cc13-4461-8794-32ed96166f45.json and https://artists.proofprofile.net/proofs/artist/cff2e150-cc13-4461-8794-32ed96166f45.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 0x0bceb1c30a16a48b47a85f81d15c8299cc6ff6760ccb8b3c0328bc5aed017781. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:35:13Z), 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/QZFYY1976578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dd9297270c4411361e363fedfabdc328ec8a844de1b6ef7799b2d2a95f61a9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6MZ2057855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24071f6e508ccb582cdf34b71bcd9653f430ac464cf6febbffd6d285291aab92. 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/QMFME2160739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c06b4da71406057743bfe7408fd17bb1719076e065d82df915bd478065a5732. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES5022201417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96472e5f4557e12ccc6a7a7555c7dbad7f02883131faa38bbc9bedda07d9c19. 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/ES5022202672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e8cf895a1b115c8e073d9d164eb7ae1b2b7f2d779ee28ca584219bd211d4d. 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/QM4TW2417896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d0fc6c9a27e49dd14c6e428311b10d7f8375cf3f582a25b16f9d871db850c. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QM4TX2419260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3482fc33ddc98fb62abf5f2b8902d706fbe892feffb9a022cb4217c4fd5e4fbd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:33Z), 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/QM6MZ2458716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67d9ec3e78a4e0578006391d81f0ac15dcf11b2f4249ce8b46c296e7de43337. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QM6N22440166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21741787bae2bc62a718867d87f67d56d20a57f87b9b035c451577114e917f60. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:00Z), 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/QM6N22493656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c62d36718061f0d852eb1e1322a8d835d12466bcb3798c3c37876b61c60ea5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM6N22493659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d9c7ddcdcc25f9545c706d5d81eaf25afeac14eb5e2fe79d80840c6ade166c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6N22493660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3482fc33ddc98fb62abf5f2b8902d706fbe892feffb9a022cb4217c4fd5e4fbd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6MZ2458716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa21c5967c76a9e08c648a5f6b9e091ed6b52c725218aa3eb19da5190623044e. 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/QM7282435631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6041ebd21a51fe27b1f219b8861b5553d3e50c3dbe8ad9390d706f9acdeab0dd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/MX1722401826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e17219c8e20937d1c97e7b5962805a7a352216bfe63bf62d543af71122bc9b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:46Z), 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/MX1722401880.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7234514c5bf5002c5529cfcd4abc2eab7c53cfe4b65e0250facb8a525e434368. 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/ES5022201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8c80d728174a4994e4b12c2e9c82a48339617bf148e41e28fe00569dd034aa. 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/ES5022202700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ae27c4706f8162c1cf98e01b8919439a442d3d415447980209df4bde5bbe6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5702200556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3b1686773466ec5ab8190019a8dbed05d374a0c5d99747dc132d758c816ac9. 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/UKXN22321626.