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 0x1337bb4c801793fef8836fbc953747f10eb5a89cf239bacafd4adfd4b47b257b. 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/75a23acd-60c7-4007-8b7c-b4501fb7c6b3.json and https://artists.proofprofile.net/proofs/artist/75a23acd-60c7-4007-8b7c-b4501fb7c6b3.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 0xb58279409477130cdb399da9b94e5f1b6e55ba5a84fa9ba2748613b8b289108b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRMCA9200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35412cf38a0d17c76d13af8507f702cb58c1f09b4c07c5ab9d678b167b4f33. 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/BRMCA9200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7dfac91b025ade8b519ae556ac252955cbaff09fb6e16920d4072911802a4a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRUM71804800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d7b1e9ced45ca344e6d6618522648c3a53cd8bd4e1568e879f472355430e1. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BRUM71804801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e4ea6b3becb9b0758b7e085db639c6b6c5eee52d7d54d50b9ca0d89dd7ca7. 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/BRUM71804804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8906026fd2240dc57e782c9d13e51948fd68c17d2897daee534aa6516c88a16. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/BRPGD9800489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8920093e73bc3ddb03eb76a598659dfaa9af68fcf4ab4e11c72bc447880ceb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/BRPGD9800488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e08adee3e78ec3b355c2850909970a66d7ef4de2cc55c9d303320deb08eb1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BRPGD9800487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdd1244e857d66ddf084124e63c5d867b03d2faa9e2f2782029b40a0ef95d0a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BRPGD9800491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc05d06275f321470e35c34c654d4797d5acb6cdf44730e8de7c2e9f2fba878. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRPGD9800494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872b823a7b40771503cb0236742e1ac71550c83791e5f064aa8f64097919a2cd. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRPGD9900711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd1337d07ca79c7f869ca4c400c4d713516de63acfe93a8275d7640be81009e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BRPGD9900717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45187edfce9fdfd9af27d61a95cd79d777108760ddf1c8902538475e44bfcd85. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRPGD9900283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870eacf268081d33159902a0cecb10f56ca1925e6259a3183a6a4eb28c54d1d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRMCA0000372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c3996bb67fa30282b2cf1fa8e2cb0448a56954dec4d84e815a890d9384e360. 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/BRPGD9800499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c9852d0fb338a4f9d79e9a2d5c1fe222cb7dd2025443021585198ecc802d28. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRQTA2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d13387313abdc56dbe51daeecb5d91d0ee66f2a62c8954ca1bc5190894b896. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5AB1612505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4fc7872611bc0563a5cd1d1886966eb25535bf5a21296cd72bf99ba823a400. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPGD9800498.