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 0xe23dbb1771e0008498905817537bab300af0aa6dc313644c8633ee5ae5965738. 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/906af8d0-edf3-4d0b-998d-6c70188e555f.json and https://artists.proofprofile.net/proofs/artist/906af8d0-edf3-4d0b-998d-6c70188e555f.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 0x21c615b6dc61b70ecbb89798396b691eedc1718cb8713232dd742eb02bc7b059. 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/QMDA62505779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ba2bed73f2016d0dcc4bbaf42bfe6cc5add9c59b33e30fecd473aad55c93f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:33:15Z), 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/QMDA62505780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f6070e68c49f76d2d50127ecc19cb5b8645f73ede3f8d2c8b02bab8e1c17c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA62505781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fba70a9c9b8a5546d306e910e8cb4ede13ccbcd2e9c2d85f35bb34364497876. 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/QMDA62505782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e243ffa9c3bcdb36fc8b78bbcbddba2f4e996ad6e7cc6841e3b40e7667f3c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QMDA62505783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab22a62287ca45fd932651cf7e6c2ab8420f0c9ad364b4a90c9b39309384ec. 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/QMDA62505784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5c590a51d3be2400e23ff1c1ec6e6b2b13023d38b3995ce4ca2e0d54266f91. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QMDA62505785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51351d293d9361a2ebca9fecc5c312e2d1c7beb591286233696dffec9c278a37. 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/QMDA62505786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1095f48741ff62cdf2ae1664e96abb101ee3982b2313d361cba748e1712b7527. 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/QMDA62505787.