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 0x444a1a6b5415270748398296d9a29da2b960b9af23e5bda993f07ed9d8ea627c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e009a934-69ff-4b45-95bb-3d01c677c3d5.json and https://artists.proofprofile.net/proofs/artist/e009a934-69ff-4b45-95bb-3d01c677c3d5.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 0x701f6bf6072fbf2ca869b7f781b78f988f3b48abc47036cd6ba53b1fadd512f6. 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/US2641425702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5736283c101b626c54d06771c7937a70cd149ea618fcf2f1bc7d2ad6eb6d89b. 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/US2641425703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6173f29ee897fb6e71d3a103795a71e2b136c4a1cf32078a69bed77b46efb51. 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/US2641425704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41efbb1255745c200e06180fe7dac7971ee904dc3cc8592de598d7279abb6bb9. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US2641425705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d6b3c3bef116cdf5d451eea3e1d512fb96b65e225a56382b9594618356c9c. 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/US2641425706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1597e01424b70c0bb7979b17bd31ffca1433c82f526dc0b3fd6454a9fed7d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US2641425707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463c63178d96ab97d7db90651a8c2996f53fdd932beaa5b78e347a8fa754c99d. 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/US2641425710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22acf7f7166cc1522a78188d8fbee8b2048ad062aa7e619c6701faa56366aceb. 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/US2641425712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4081453a278425c9d3f3ca5ecab8bbf47113e01c92b623619aa605710302dcd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US2641425708.
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 0x9fa488f127683b9541b71c8f386a05e3435d3fcae28bf3cb29dcb1eacd3d0034. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US2641425709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9af005112379f23b0de8caeaa82c3cea215a204bf80b2bd2ed44370f5f32a1. 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/US2641425711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad61cc61373193fea4482d3d3597cb7063c3d74009cba0cfd0d7fb1efcc17ec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2323343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0faf4f16e3c6bbef620714815e70d2571d2d9c97a813b36b5d07dcb588bde6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2393153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce16ddd09ecc6f561734e413bd1ef41de0a337c2093c36287baecc18e886e933. 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/GX38U2351887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656050f405190facb84c73d82abe54900988780ba5f856a6eb223eea86b85ad4. 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/GX38U2356268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f75d24fe9d7ff2eb8197d6035ca33f7cc17cb9407890c1de87a55366920d8f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GX38U2329448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5487da9e740854bf10c6c967cff3c81e0ddeccd32688e0552bc8f39e42f2de. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GX38U2372439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e755617e8c75283e0b9836c8910582cd7b0d5a6ff29aea4aedd0b232c7e0d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GX38U2381477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe94f68d738370d267df3639624b8f0c8d6762d7f4325f9c1385d99f6a657413. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GX38U2325846.