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 0x7ab9ef1fd40979a6c6eaa0f3d4d4ec41c6823657eb9696433e372998c6e79ac9. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37b902de-0d96-438b-b329-f63ce91fecd5.json and https://artists.proofprofile.net/proofs/artist/37b902de-0d96-438b-b329-f63ce91fecd5.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 0xdbf3b23fc9b6e4be9b1546e09700b8a9ee9d1256f5ed2b266d171401369c8755. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US2761993152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3923b2f1c8fb1ef67c24a9a2ec2603038bc5e2295079fa7b201e11ac7fd6a90. 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/US2762101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ecc9301048d6bd16c79c555580082d8a576b2e8cde71be07c61dc5990ac1ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USGY22250605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3923b2f1c8fb1ef67c24a9a2ec2603038bc5e2295079fa7b201e11ac7fd6a90. 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/US2762101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae01c59d2bafa99cd2729256e71f3e2506ca59ca451b5e66927c2c2f6a1050f. 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/USGY22250602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ecc9301048d6bd16c79c555580082d8a576b2e8cde71be07c61dc5990ac1ff. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USGY22250605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b442b1169ab0c7025cd9e9e86bd34d2c502ae34de46b9201c3535bb805c6b0. 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/USME32400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938b3f1f59b93ed74bddec52e7f8a598378bb3aff5ae1ad57b592585c04febb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USME32400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ca14843d9ef5c94689f36e94c6449a49217cb904e1a4b6ae92867b7f303750. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USME32400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938b3f1f59b93ed74bddec52e7f8a598378bb3aff5ae1ad57b592585c04febb. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USME32400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b442b1169ab0c7025cd9e9e86bd34d2c502ae34de46b9201c3535bb805c6b0. 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/USME32400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ca14843d9ef5c94689f36e94c6449a49217cb904e1a4b6ae92867b7f303750. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USME32400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938b3f1f59b93ed74bddec52e7f8a598378bb3aff5ae1ad57b592585c04febb. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USME32400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1f73a770c0e30a2d7d9fa7e009840df654b90cbb62782bf75821207b0a3ba. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USME32400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21284459dec59f9df4d78658b30197c44b46d15844d49d32590854e70de91e3f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USME32400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085285eafc18a1e1b0508c8b8bb5bb382bffb6961d12578d18f750509c68fb61. 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/USME32400081.