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 0x8915db059e7e3cbe72e46b4f2c76436b3fd8954cb714b7590fbf4f5c4cd3bf4b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4afc897f-991c-4d98-9261-314b41352864.json and https://artists.proofprofile.net/proofs/artist/4afc897f-991c-4d98-9261-314b41352864.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 0x65b7019f542bb5c2250578a8c28356c401cc057daf2e8ccb6f6ab6b7bdbbb38c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:53:55Z), 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/BRRGE8790140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fed2f47e2d0251da617558fc9902ca05f0cd026f1c4829bf6ce5abc035d44b6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:46Z), 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/BRRGE8790141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37100a2365146cf2c4b05f7e28503d744b9b2007152430b426caea16b18a143. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:50:59Z), 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/BRRGE8790142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b8a83e55fdf1e7073afba93cd5082ad05274ed7d731e46562a76e250ff7c0a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:03Z), 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/BRRGE8790143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5631c9fc46589b01e7b0c335f1e2e9eff3270e9b5607cd3d991029535866e5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BRRGE8790144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e609b8624fe231b69d8dc41d5d8ddfb9bb2804f874b7d5dda70ffcaa9c3bcd. 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/BRRGE8790146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceedcefec18c3c8b61478433a1beb7daddadc603436cef1a1149cd55d3e42125. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRRGE8790124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401e9d3fef899f0f03df5f88c99f543a972a9ceb53b98fa324da269ab1195040. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:15Z), 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/BRRGE8790125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11442f7b236a6c5f215ee23dd7e5f0571ff0e5effabf2d7d109484209b2ac5a0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BRRGE8790130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fe7440d3388592a52a71ea1b255528486e5dbc8f9199d29bfd81a75c5433db. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRRGE8790132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a912168631cf7598df918cec409151ddf90212e5d1c39f867ebf45028298e. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/BRRGE8790134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32186e66c0da6865df6fc8d689c28856f0b9c6f3bf8c28b3ee36b572456fe922. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BRRGE8900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41fe7a53d75cb3c869450b0803bab313a6f454e7ca291b385f16d6656fc39e5. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:05:58Z), 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/BRRGE8900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14f5c5a32f32e155a221b03444ceac0b240f9cda551d3247c18b0c2a793c296. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:29Z), 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/BRRGE8900237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d4849406cb718643d5c742b959ea9b13b1e4b87f5a623d66f8b54a6f9316d4. 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/BRRGE8900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28463df4240fad3d03d8e69ba6d93a70e4e136ccee1d486584b3109d9eae77df. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BRRGE8900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829ce9b84e42d03aed53639e85bb6cbcf21fdaa4433f9619d9daf01b177ee00f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZF8D2501348.