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 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 0x3d2e7641068b1d0f5783c62b538a1f9ae3e1672160faff6b12ca740f9462da6a. 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/e407e8a1-948e-4e40-ac0e-51db2bbba20f.json and https://artists.proofprofile.net/proofs/artist/e407e8a1-948e-4e40-ac0e-51db2bbba20f.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 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 0x95637ec470e8b3514842bfea32e085a514f571d60aa9574a85a368d1b33df1f8. 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/CA1WR0900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59841a612dd88e21efe6e9cde122f7a8e60a4207306da044475e24eb2aeab152. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CA1WR0900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297f247ce8c58534c564b9dd083a5c5ffa556d34cc3f5bfd35bbdb9a5a8a6a6f. 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/CA1WR0900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d2e2a23277e95d2caf0d1ba3844fc068c1b6064f3b03b08b2c80595b40f908. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CA1WR0900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da4f2274bcaf63f2e3a80db456c62165b190d21b7bc357de421f8893bb5bc8c. 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/CA1WR0900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a33143233028d1bbd516474fd2b3a5c8c9762a898d6b46212f589519bb59b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CA1WR0900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185bac2fd6baaca6e984a3cbff0d810ff09885d06f138cd37ccf59a6d0655d7. 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/CA1WR1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16f4641c15b2e5ac52e8c7f64197e4a71fc22d18111e580ca81c56374e0cdc5. 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/CA1WR1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35212c36724a084a9ed26e9cb3de80a271b53e3649aaabe49d9fa6e3d0a7821f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA1WR1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cddf8b22f10af74a82e7bc4b181c62acc3900e4e44b68759e2f626ca6f50c22. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/CA1WR1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0629b2057d924b406cf1bc5eae6d7bb617d4ba48c576ea7d0269dc8e3538947. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CA1WR1200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcc78834c8dac9cf28639be592c431d837e604b732ca05ac2eca2cb3c1c7f45. 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/CA1WR1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb244cf7d93f29fdad2da10d63b77fef5882013330363f6b9464e65b5d5b005. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA1WR1300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd109bed385850b550749ee468ed2e2fc79eac56bfb5ba6d41af0f4ca95514e92. 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/CA1WR1300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24892ba7c5fbca3db688ac313de55d76e1a059d31a9b72924199ad59ac3db645. 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/CA1WR2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929fd2ce29190d08b8d9af48d4344443eeb694379ed77c7193bd18768e3ea314. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CA1WR2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098c930821df7f143c16b795b43cb0867478f0e5847cc272b9720dde08000328. 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/CA1WR2500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca8c27dbc419e4c179b8eb85774a2fb1375dec09e3517e8a7bc02f1359336b2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CA1WR2500185.