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 0xc688a6328121a432d3d0b7d0f51301b72ddb8fafbafe4b5c548d50b17440743c. 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/9566e94e-2141-4da9-ba9d-85bc4cc07dea.json and https://artists.proofprofile.net/proofs/artist/9566e94e-2141-4da9-ba9d-85bc4cc07dea.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 0x8ca4a0351701ea5dabdbe9e8c321665aacbeb508cd9e224161e8c648e1a7b93e. 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/US83Z2486997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b923e119bf42afc8447e55a6df4ae250ff338f8c7992cdc8c8a4951c70fd8. 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/US83Z2481822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04ef75cdb0d28fa742f77ba36d89911efcd05bc60553b1f0c882588f9df1f64. 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/US83Z2476629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091fde587aea581fb91affcc186162cfe3026ec3969ec2a4b6b8a9cbc66fa3ad. 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/US83Z2471047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc61784aded8d56bcbbd5a3c1216746b7f9101ab17e0da93f64784bb2da8423. 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/US83Z2471048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852a4bee844b7f4b5e2bf54e29dd56921f6441620378b3551224ead7a534da73. 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/US83Z2458301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9807851f635b4d0efea9cbf30a457fb0f45002e923f499c65bdad0e9c4b01e1. 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/US83Z2344343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c53e10657ced78eb211cd84eef501d7ef9f89bcf69e53ca0c2fd10d8b47e5d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2344342.
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 0x01b0d3822416fbd9c0466fdc6621685e5e2b95fac95521ac4d5bc6945d1a802e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US83Z2340085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7508b43daa534163ff1ce130ae98350547f342616b1c49c4e7e476d5ebab2800. 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/US83Z2332006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfa7b092d1aa04bd9ad8bc20ea8c6fdd140870ea44adaa5de27b970cbb77293. 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/US83Z2332007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42fefb37ccfe64d2c4d0c629b4a287f180952df0b8d269ed3a1f47499e6ec2f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/US83Z2332008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cc106b10ded7fc1e01387667451cd511d85e99e45a00562a93783dba9f2acd. 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/US83Z2317894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f785ce40a487eaf4cba3e146569244eb4cd7da6d50063ede12208839df5e72. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z2308660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766ae528b1b82afedf5ac31ab8c5d770ec9331a558cecbc8973a8a930f0eb58b. 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/US83Z2308661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf3e6c739288c3000c9efab83b3f059491a0f86644df396336c5aa7af8950f9. 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/US83Z2308664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a0bbd2ce4d4ede4d21168419348806d986568e2fd28f0262d8191bb6cc510. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US83Z2308662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71ceab89c92d1a6409207d5f6baded7209b23ecd16c878c1f8f98b90a35123f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US83Z2308663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6072954e5a05da186bd3d6d36f8a2b83a3f3cc9c3ec8f011dfdeffb6b923db0b. 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/US83Z2242454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216431c893ecf96816c0fa0e06dc3913d1167028e46d30b7351d23153d10f0a4. 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/US83Z2242455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf072e539b388f9a2ee761616717dc7375a59d0e1643880b72fd5e3c63c44688d. 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/US83Z2242453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bafb0fc5f18d8750906cb14ed8500df0f1d10b02feea14bde73800a402c56b7. 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/US83Z2230369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eacf8b8683320235297922d9f9bdc365e8a2df808b0eed5fa08abb2d792f303. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US83Z2230371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67870cb1a0b7dd1b19b74ef41b2acb9ee5655c845d540cf75ca21117b754e607. 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/US83Z2224240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c607c97fa210818dfd590972027088d61f2958e751e4037ac54321aed377e30. 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/US83Z2224241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eca76cb6a598bd8f8718296a8fe00893ecfa20a61afa79237871d554a8574ff. 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/US83Z2224242.