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 0xbe1cbd105dbb797453672d16fd4ea26389818f61b0ce23cfb51e3ed9cf53ae80. 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/60b88a28-cc86-4d35-8065-5d4645d338a5.json and https://artists.proofprofile.net/proofs/artist/60b88a28-cc86-4d35-8065-5d4645d338a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8b830e60d7bc955498ab9e0349ab919780cfd46519d642c7e54133c4b282280a. 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/GBWUL2127355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb9949394200110bfd65caf951be3a5f25d7af67093ed3411bec922819c75a3. 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/GBWUL2127357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef177c49947ba3b4b9caa161afca1fd9fd8f73278c052284c978c85172fcc250. 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/GBWUL2127363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b8511ef59ada4537333a2d5f5ae9392262c47d8644ff05695a9ae165408227. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBWUL2127354.
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 0x35da9c0a9af87ae5e396585c8ec8a4f028c2b5d061c98d5917ed5a592b1ea62d. 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/GBWUL2127356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d14e7d9b84db256c3a07b413b18dfd2f26727838c8fab48c0c26c3650a2914. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBWUL2127358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1347164293c06d86aeb02937908e26b5fab92856f5418688f7b9067ccab8b986. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/GBWUL2127359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0578454e9e1998ad824a9306825f387d370482094cbe1bcafcc626d530f8dd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBWUL2127360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de2502e0ff775423a988e2325811e9086aad786a38f048a458b64e4289da68d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBWUL2127361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe54315ce4880d9f15a4d0ed5cd51ebfb84413a9829b5a979026aed180e074c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBWUL2127362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6f155d9ae3b8f2a1186f0bf72b89f2f7ac22d71a30b718b28cba2be9eff17. 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/IT4NQ2200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ee5d3f78c53fadcc9428dd74db447159c6a7aea1c20f3bdf554fc4edc0bb4f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/IT4NQ2200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b1ee448ce12e4f5438d69edae0b7c8fac232c4abeba2ab6ead8567812360d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/IT4NQ2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad49f6c6bb741d409f9f868bf5434745de2525bf63b8e40a9f10e2c7d6d806c. 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/IT4NQ2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4ec1bea2d2de5d69723a261f75a78a02b083d88bd09d4149d69dd92088655. 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/US25X2203214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196288d131319ee144b01ce56775184cbce1f8b94b3c3804ad662a7469f14c09. 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/DEX262400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74320b890c72f389d36882f32a9f5fe0b3fed468374fc8dc7ddb708449b0f93a. 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/DEX262400909.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6de756f113a83da22b8f143ebc9e2f0a193439453f9bd1333e5e82f6c4b3ca8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEX262400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb45b2527bb588a4ad07e55c48f37b87fcefdca813cb8b0f02beb9c3a6134935. 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/QMDA62459532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93fd7479ffaecb9086dce0b31c13f7f31b9cab778489252f1e185a878e13e85. 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/QMDA62459533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55416934358b1a4af96dce57a264fa6bcf9fb771e6effa1d6fd958fb6aa95c75. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMDA62459540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bb1f547459cd259ba896d90a94057a24f2f09217db91ce67eced6e4e9435cb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USTJ22562504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f1f683e503ec75cbd6325bdf39067a90a657fb2cfec13c7463e2a89ab038c. 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/USTJ22562501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc28130a7a00ef49ffd8b23f021eb18fc9e8bd52dc0a98b59b7da75a82501689. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:32:31Z), 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/USTJ22562502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafcbd89757d37a9f7195a62b768b3a3acdf5f82f7762ac10a178065eacc9c6c. 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/USA2B2404185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c12e641a718daa9eddb40fb6edb97e6ec423259342d7926d56f2e8727f498. 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/UK8261900747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13116ef69f21d3e9dbd841d27ad8c874abd7c5a024eb047579ef2b4597dd2143. 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/UK8261900748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb04820fd3abe5a28fd5c9c4dbade6f79f232cad792d9207fba4cbcfeb41d44. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBRKQ2250124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd8e59e827fadbb475789c235860c1173a35787d0c0be1c6f0513b9006e9f9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBRKQ2250131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3317fa3ae377452927393904f7c8537ceea23f3f064c935c03fe8efd301ab7b7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBRKQ2250126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401fdfdf623e6805c7b1134c2c91c6214b0b8c2d753bfa59fe2e8801738cc12. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/UK8261900749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e58e1e41fb95474a975e559d4d5b344641ca8624f3af19067d0dadf2e3a927. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UK8261900750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a7416604c53c4317761e13ebf45956b57feeda411541de6fc84546c5f0bca. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UK8261900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da2d073f94a54a8d62e95811c12404d2ca1612fdec4f14d2f279e2159226e4e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBRKQ2250137.