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 0x4157e784a9aa738fb65c3b10fba6637cab7b6e9f514cf9a73c54d2423fd0f9c7. 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/da32ac60-93d4-428a-8809-30ad7c990796.json and https://artists.proofprofile.net/proofs/artist/da32ac60-93d4-428a-8809-30ad7c990796.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 0x371e8a2e64ac11c0229a8d66b31b27d1987be824617e392bd735dfa0b30f18b7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:17:28Z), 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/USHM92496703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2367740dfd6071e080a4c431bee23d222a73462c6dab5da9f34f67ebf99170b. 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/QZZ7P2459834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1bcc513db31818acfccbb1d2f5901b66b1151248643cbff66d71d4ee1a97ff. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:54:57Z), 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/QZZ7P2459835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a2849f522137970d42602005d6303028ae1f2955fd454b0bcc9d5d5f6dfb52. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZZ7P2459838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b782c7ece17118a5624d082516d0c051e1ac896be866a2e373c9feb006b8c1. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZZ7P2459839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c8ccac1b98ca1e54ed91258cfa4c8b4773713b8560364129d5e1f309a6b458. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7P2459840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2558f604624f66392f90efc9a60146f60589cb3890857c193905a5f51a92947e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7P2459842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251cd83acad235f9248639a3d3f5c2ce6144fb5392129821d95768be720e351f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7S2410109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e6460b0a722ab15dbd64d89ef8e3c6f41fb7ffbd4e1618a22a0c14ed2e96aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:46:16Z), 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/USL4Q2466298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13464b676209f184ce1ae9f4642d78e214fadd4f4f1d535567d57975149395d2. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ7P2460614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027db17e009e0eb7815bb5a3fa847b2be6ba4a10dcec9740661a927729df69c1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:03:10Z), 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/USX9P2449163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422dfca19511517c4596b2e562f9c7d154664695f0a4c1a22007ae98dc8574aa. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7S2410119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3daeecdeb128fc0fadcd81432c7d9adec59e4db22585e6f333edc35381f38c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7S2413529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251cd83acad235f9248639a3d3f5c2ce6144fb5392129821d95768be720e351f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7S2410109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3daeecdeb128fc0fadcd81432c7d9adec59e4db22585e6f333edc35381f38c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7S2413529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dbb39aa0337f36b22afc023932ad2bf028a0f05691f48e1e5fbf21daf72085. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7T2472766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa54e492b4ab1b6fd7d3ee2c5fdef8266b2b18b479e27bfe01a2a0f69c6fce. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:46Z), 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/CAHQJ2567576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541fc02bdd3d93d5d832a59abf7185113891a7998a61af8267418bc11a5d9baf. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CACWV2564257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f12a2df4f84b1f8bc970be8501aa99d28a0525da420e436f374faba92a51d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CALVP2596318.