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 0x725d09469d3eb33ef0e2f81487cc4b54aae86292800a8551440c029c6b6f2637. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cae8fba-a833-4bf3-8804-cd7ceca6b037.json and https://artists.proofprofile.net/proofs/artist/9cae8fba-a833-4bf3-8804-cd7ceca6b037.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 0xd084e29b02702db271c67307e7d69d800dca941369eea7ea0a5bffafd981f3bf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEN2080253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac5001ddf88b87e9e3dc5fc74895619cf06e3e41384c07147a06838048d8dc7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6J2082868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9207cc7e915b6e746e8211d1b72387dd23f5968e285f01ace28b70c334f9766f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZK6N2080041.
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 0x94fa6ccd6a5077b2c2ef05bdfb5bfd1d34d8057c1218e69bc1a96392438fcc16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFD2095906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6770b753437181e356f615e8cefcfcfaf3077aa2a5fe03cac434af15be1ebe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFD2095912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5dd6123afb645699b940cdc7e4eb16ba8827d926d0cfd9605f019460d4ad25. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFD2095923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d45391877c50fe2376480a45132c113537858ec6735d18cf1d3a9ce165d5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFD2095933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3b4a5d4c2a091e487d49c0282e2223ffbc7d83e0bac24ee8b5c889815b64a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFD2095940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a1795d793193b5ac02e806c97e701096dbdc9bbc417a0d0596b7bfbe311857. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFD2095943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c29977f7c40e060e9c877ac2697169f28e485d73524146df50606ef49ed832. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFD2095947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a60fd0a4659ef21140c17bf5e357abf82b548c5411c3436e48b427a1226ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFD2095956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed000ec1e51f31e90f92928563f8c622120355a2d37dc49cee96a8e9d77c108. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T16:51:31Z), 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/TCAFD2095963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041e703beca533a5755a6d9167e4a86e67fc4aadc65e20b8b8f415627455866b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAFD2095966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53d13567578220833e88f46dbfd84fa29384f03f8da922f022af57eff434df1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHR2371552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a888c56da3834743e1bc0db08f174864ebae984350e5386a9dc19395289e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEE1987962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5138b64a3506338f41241fc1372acc4ff886fc9e37503271779bc3e911ceb181. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEA1958379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb317c414b6661bc3cde68c40741d02e0e7890dba470869b76db954a02ecbb230. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEA1958380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8eede4f84892b0331c5c95412e04dd6372ada6706291d2a2eefdcbe7f27447. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAEA1958392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e23637fb0012ab17344a78ab9e737857bef113da79eff5b6dd1cdb50c5732. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADY1878277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753b5c78f7b4d30e912323f6f6bd3bf725bfcf046b9688ef9376a1e92ca8f83c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCADY1878279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f73127256bbdddcd65ec2f6212eb1ca7457576eabbdea726bcb54fd1f4b997c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADU1844032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10235bd72b9ab67a593fa52c1257c1e3f1b4cbfc5e52dbaf8fbe7b5e84d46045. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADR1899195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405a06da88be6140bc463186fea426f4325a9a05634397338b61c475643095a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADH1770768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed639f772ec591b988a5ffcd58c23314e95d396b1afd95b3dac0f2a46d533420. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADH1770775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58b8b0e9181aa2573c31983bc553bdab80e87214a98367f1ca35de9f9376e34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADH1770781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561446483961a844ea9038530ff18d517322dcaa327dee9e7ae344639b3ed70f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADH1770782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a3184065838d9d747a9f648f0af33105ddfcef9eaa219dd9f493f6d939e7c8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:58:17Z), 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/TCADH1770783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f530bbad2319b27daf64d58cf8b867d937521ee7dfc78201cedb56a19434979. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADC1755310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8288b5143b4a67b8d1c0672f0f60b2bf9abc7f2a5937ecf35aac690f011de29b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACE1550271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4717ae8ec6b06b1e5036b0082390973d13de995ccf07608a15a3f7b0b03ceb47. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACE1550272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc30c45089e3d283d1e884519feba3139bd1178b48b8c25d8883c0109867196. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACE1550273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da242a202051fc48ae73bef7fc2b1725ec5f6a1a9026801c965b7bac7db1f0a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACE1550274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e1d920229655316cee3fc16cae6163125128b6692f02d34198287cb9e7fc9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACE1550275.