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 0x8bbbdc249f342fcf0cee28c77d19cb03df56e422b465343c8ead3c48429679e5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9391b63-2a2c-4342-97c8-ba272ed7e79d.json and https://artists.proofprofile.net/proofs/artist/b9391b63-2a2c-4342-97c8-ba272ed7e79d.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 0x896009418bbfc1f8c2417836803b3ccd60195a5c5aa97b1cef3ea519ce793d80. 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/ES5150901182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d8b1edaac6238f7aaa6d0a2b29a1085e397f4bf4b809116e5a150c10941b36. 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/SEUM71300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558096b718e40074a2829a3d928656de4581277452fed4983128eb49153dbbf6. 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/SEUM71300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70377b86d8d59c74946b1dd35669cabacee199f0cd02490339567c148e739abe. 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/SEUM71300721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21e07b3ed2f65910d7d70c16a5a644825ddc7e362e2c8d04498af592f5e2254. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SEUM71800460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728dc26a4fc21f1339cd7cc13f58dc613acb0fbed4c5bd8a8d0f9f6a0164053b. 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/SEUM71300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6645e9bb857c19bddb13851d997e09be643f66cd636370d1e5c4710123c1c43c. 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/SEUM71300729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1894adda5788c4ebc7183d0ca53563ce6c308dea699a7f0c0365ed65825fb7fc. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEUM71300716.
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 0xaf8ebf07a65184b1d7147ec3d48c26ed2085f8becbb3d328a0be98b3eb6db1b5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEUM71300717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0cdae9ee91c5852a823fc4128b54a416f3274df4ddd81a13887689c8c801b8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SEUM71300726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5cd3fe2a1b51b577dc6e71625b2dba080da1db27d2bde726ea5b658e6ce2f4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEUM71300727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae104e1f58be9c06bd14453c38623ebcdda8ee0306a7c59b2aea770cf6ba50e. 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/SEUM71300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8da83350032b22f20cb9d9c17ffbf0ae70bdf849097044a59ede1b2eafbde0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEUM71800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa786626e6cb16f8258ae80951d188670684c76b06f4dc154408f82003fd77907. 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/SEPQM0717889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270108bf5acd0e816d92ca3120f4cbaf74c315ec90ebcb8b32d7e4a33c3ae859. 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/SEPQM0717895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe7493f79adc8e916c80b88a8da5ce56b32761214f4e964a46be393e400763. 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/SEPQM0717896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87361a7e4a11f5bb505b01d8b7a2c8b04ec2e3b97529c35ccd406b3f4dbac7b3. 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/SEPQM0717893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69be83afe283f18be94744279f9628697d2c71ed65825d77f197bca1c287848. 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/SEPQM0717894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf49fe347739f6f7ddd7a676f90cc2ca1fbd6d9b7276b7d2f17099b53aa2e48. 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/SEPQM0717891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3cd20bc9bc42b456a7e6fb856c1fe020555af1d1f26b9815e0f7619468a726. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEPQM0717890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c5eb3a9c37b89c3d4e9110bfb4ba98e81db2b8ce7a4d88097131be4905af8. 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/SEPQM0717898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f12aa117b59c72a2a92ceef8c08e9330792dd1be712a0590966ed9d033945f5. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/SEPQM0717892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c2d80c6c45c778725d87084fe1d7c13e2aea46c4a8ccb0d464a58660bf6426. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEPQM0717897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4cbffc255dfe3dfae10df98045c3af7fc5fad8df965db0adcaf264cfa37b48. 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/USAT20900758.