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 0x0554d0b3917c0b841deb1766a5d35712aa3b8384a3a3db506ee69f49d6838dac. 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/135be050-930d-4ca5-89b2-7ed8eb436241.json and https://artists.proofprofile.net/proofs/artist/135be050-930d-4ca5-89b2-7ed8eb436241.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 0xe1e170dc04e27c50fbbda9135d125038d97308b1266e08a2898da82fa5f4c5ab. 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/BXDS92200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852b99f2408211b0eae63237e532ab5c85896aa80093688101b7acb0da4ff8d2. 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/BXDS92200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81249f39fc62da35b64e4e6f04a242b81b31b2e353daabb7c932c5263422836c. 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/BXDS92200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f78d77d5392a30c2fc479168c2d672e91a0b9aafbc811b2e18a3801bb1227. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:12Z), 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/BXDS92200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa1a3e15a739bffb66c7984110f7890da9b53f9f7235bba0968391f3c418f2e. 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/BXDS92200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee51f1da3a67ee97c5d94fa3a5538e19b9ed4f794c8708e8db1b97908b6e0171. 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/BXDS92200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf91ab228b41f7543a15a6645bc944a994ff7d58b7a30d7bf6cf8ecc045d828. 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/BXDS92200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056a5b8ee53837754be59a5895148383a5e8c884022327eac852ba3cf47b11f. 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/BXDS92200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330130d3254b8221823e6c75bfe2785bb0222d29625d57d61439d0446c8c0db7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXDS92200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e1c0c3d7d44415d58982dfd53e7b3dec4fc2ba62bf4fd7b98d0befb0e50c88. 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/US3DF2439568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ed87e853616baf778463334e68e2b29dac951d20587b25aa32bf1b1ab8ea95. 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/QMANG2238752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c329ef91aed3a710e437aa5893cd2bf8afdfaf4eb508fd43826ed2dbcf39d7. 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/QM3DF2258969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a88299f62421e8d4db42d100bc65c21b0a5dc32d05f7e2ba12689af75400d8. 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/QM3DF2258970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8563fc82d1e13d44920b217732f5c89054457e85d68fee43ddad87a21be1de. 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/QM3DF2258971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3639c77dc10d6b4b3333877b743a2d706b959a672e009b2d2a39dcbb5eb5715. 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/QM3DF2222920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242e7968ab85465161107483c9a5582c8e96a2241b441f8e8189562d7b0b306d. 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/UKZGC2302623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf46bd487ec67df286970d7ea7242d13b7393e3734936c8dc95116d3a64d6b0. 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/USANG2275146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3a6c00a83aa78502b77fcffa01966f0ddc59e20fa39fe2bee59cf2a9799733. 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/US3DF2259137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8022d3f358f2e01babe67193516bc05437378d3294bc39786d735ac1b39c8653. 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/US3DF2241893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4cf8d529b9d38992c2dcd3e90d7eb2f234cec002efabcce434024c5d5f4025. 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/GBPS83910225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff5510c167b043ab25f125a6defd882f70fc5fda5bb46dcbac45c3ac3e5e7b. 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/QM3DF2192942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1768b59ec49160b78edccf55cf6ec52a4a5880df8e64c5d3efe58a02045ed685. 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/QZNWR2157641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b391639f59434955cdb2dcc06a62018fb71c5c1616de813f116ecc7c8a668d. 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/QZK6J2162877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb40b410da4fbc5db588ece521111d1ebff0bafa0444c18fef59d16827501811. 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/BXDS92200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0043fd576cc7c42f5bb4a1e01a2ff2d56469f273800522652bb605ecab9b10. 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/BXDS92200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a50e9b9a00e1f73541e741c3be69e365e3b3c8c8b7eade3df7dbc7de7e768bf. 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/BXDS92200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54720940eb05e7ee0c8b2b1a3958a508101c994cbbcc4bf70c69f14eb4a291. 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/BXDS92200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362701b896fd72727c1b04f35c53dc529eb41c2d7f3377a0d0554391cc370e5f. 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/BXDS92200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7603983d880e150b85a892d7b71c4ea9d124cc5cce25cdbce588bd7482566979. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXDS92200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3cebb55dcccde6069c5836759d07602a4dc8145d7aa59eadccd446244713bf. 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/BXDS92200037.