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 0x42c46726e396a168dae7e2d98d4ed94d62cdbec93cbe1a4fb7429bcf551482a3. 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/694ffa72-a8f4-4196-9c46-6f13667ba4a1.json and https://artists.proofprofile.net/proofs/artist/694ffa72-a8f4-4196-9c46-6f13667ba4a1.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 0x6100e3d605acf3871a91d7e10d6a3b116ffcf8091dd82710005c3d0914e0cfd9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INN242002794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4556bfdd44898b7d76fe2c68e7a5ede37e21d80ece4789e7d3c4b473a8892c73. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INN242100874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ce410d4eb62a1ef29007e0bb168d92c2fe1e711b1ffb74ffe757b7def434d. 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/INM8L2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736ad3aa3356cbee007dc06e7e5cdc6510fafd259a4d3644e6fbe7a33d3a5d2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INJ422200020.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204c7ada3559f3f15c4f6ebc1103dfabe93a713e725495f4d8b785d851d051d. 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/INS182300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a174c910785101ab65d08819ae7a61af5a3ad69ff51a7ac588c56ca8efc6f3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA062341918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe610643c82fb5dcfb20b1e4f29614ed7512e52ee625d4e530040b103b2a95424. 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/INN242311252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cac7e031826746c31df33f697655ff60c24eeea679d035fede1a15ba2fe777. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INS5A2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8765cdb2c5facb4f79e542c1663dd393a1db3f57976a2782696b748b9e751564. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/INN242400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10385b68b5bdce50f82b0567e04d2d1883c3cb2dcb815aa618f20bcf486ad37. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:31Z), 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/INN242414451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbc632e127a1b070be93340efe14912fee9c80f5bf6882259f916bde1d51556. 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/IND862406410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16e02826a8b9160f0df7bd39f79aa862fbf409a26dac8f8327385f2a4def982. 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/INM402404018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e79a796f9c47bf3b426686114c94637dba1ddce9b0ef5de2231954271b7a4ba. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IND862500708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ce6c50f20c662051266503a58cc27488b141a40e321d2f6ef28e0b56e620f7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR59R2594176.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fef0ebf7f642fe78796e862e40051248385f038a96e27d782c41bfa1c766cc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INN242540476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd488a59b22001fcce5cd1d09e21fd79761b7addb4503dedd68e51471d466cd8. 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/QZK6H2557426.