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 0x3b53feacbf381205698012222ce3b84a08cf6c91d1e45e1618a5d007f1f54824. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da558f29-7b4c-46ed-a1fb-e6594b7b6e32.json and https://artists.proofprofile.net/proofs/artist/da558f29-7b4c-46ed-a1fb-e6594b7b6e32.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 0x63913a3e75ce27d8dc830715febdf36d660116e1154975adfb30cbf798459331. 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/FIUM71400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d6445e35eb8f8b7167846064f0baeb11a3024446429bc23d1687137a37be6d. 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/FIUM71400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10674b593ab783896521d622af655cc8e968d3783c15e7941f3941d00e82017d. 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/FIUM71400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eddf2f9d0ebb9bd62904df27e1f1d69799a2fa2d316252e4362707aaedf045d. 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/FIUM71400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76953aec6e78eff54118122b6af9d6a9f76d79adc1534962523bcfda8628e496. 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/FIUM71400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39112c0ec023f98cedd0d0470f36b8d644750639b12f29cac261a4113445d742. 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/FIUM71400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d016139fec44689334de4d9a24eab4b0df57128c7aaa39a7e0fe5f57cf7bbd. 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/FIKHY0900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fda6f5e4dd8b03f884f6fb2de20e143f4e2356b37520f53dbcf34de5c99165. 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/FIKHY0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e8d2da218201d0c62643ef35198db4b0639d3b3c51d89fc2c2f0c949c8c10e. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FIKHY0900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71f483717bd8036753ee703ac0add4b0b2af57fe015772b2c82cb8c4b65c147. 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/FISSP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5338886b6624b5706e249f65e5e9b0e8cdfa1469439352d27979a7a819836632. 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/FISSP1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc3c6a70537a13ac305c73f1e71c24e186f4fdc2920e2b8984916cb2bf73d99. 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/FISSP1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba9bd98093894a6ff0bd290461be5b91aa9259bef21721ae5922cd902023e2c. 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/FISSP1800003.
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 0x41a45b3c1caff2568a4019d8ab199ee0476bd7bb28a7c00f1873f9341ddacc28. 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/FISSP1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb61a9583f9b14fb2efc1184860208205d5550d45e61aa802194afbc3b81de2b. 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/FISSP1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3aaaef0a7e42c8605ac0c2d92f3fc9bedb43f60b317de27ccf3d514d9e778. 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/FISSP1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a43037163228d64f23b19421203561be313485a895fb3f56ac6b30b3c5f4ca7. 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/FISSP1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0399f1ed0806714d26b4a5c0181b2e2f9bd8ec66d66653b1c61e40c5cc731ba. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FISSP1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130889578d0fb25d935d589c6db9607b8c61625614399416a16862f7f01ecacd. 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/FISSP1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396445a6984259fd0558cc214c42c90a9b3f300c62946f934d17e66e349ab47. 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/FISSP1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b2508ed8d727f223a3beea3f8a46615cc13390242ffe6ce2e5c4609e186fd4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FISSP1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11253e5d3d6bd364f74f7a698cda50caceb811b2bbc80f0eaeaedac2351f656. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:06Z), 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/FISSP1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7f77ec7de3132607fcbdfccfd1eb6b380bcbf1d31d73fae8db23d376ec28a7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FISSP1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b6c500a10e473551fa1dd76fb123163c9077fe74583cf92a8d7b78e2f4967. 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/FISSP1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3dbe57a590f9cecbf007360ae5cdacb6a1040cbff9f7c90abfbd79094ffa00. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FISSP1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834982482c6dc898f89e30f485e843a68ca191db16fc19231f75f9c883a56141. 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/FISSP0800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8d7f4ea25dd7b73d7eb39360321d445472746af9ef2a73ed671c761cc6db14. 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/FISSP0800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f450e5a93549edf62ac671ac9566abe576bbdf73cbdd034acbb7daaed3a89. 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/FISSP0800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dfc4a54f497bff6b83be63c7e459a5643c352f35ed2c189647ac653687a4f1. 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/FISSP0800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1babf955c3e8d7ba1ebe9093ca608abba284bb881cf7a6a8b1469f2aad31a. 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/FISSP0800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb8e371e5ac171d26e9ad09919485562118fe2cf2d44dbebb5079dff5f62d40. 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/FISSP0800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea387c0ff1a4991176caa2196343d1903e58347facb1ed8c6769e087275cb905. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FISSP0800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09981c610f64542bdbb107c1fb7ef60a3df7c476aa3c1fdcb49335a7fa641c8d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FISSP0800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629299b94f1d0b818b0e2fef2d697d2107d3a775a02e6e8f51ab0422389d597d. 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/FISSP0800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb37643deb8c51bfbded6ac7d198b21c72310c9643d40f1e53f4578824809a2. 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/FISSP0700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49f2b79bd40996c59531077086dd3ad6763f5e86d7faedcf881711379728622. 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/FISSP0700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77681d5000843f3c2826c020e98c6e47c0409b32ac3de03509c803ebd3af0b69. 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/FISSP0700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20b3931552a09f59c3fc0ab9b01069ff5c6e923549c69fbb5b99290ba6f20e7. 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/FISSP0700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5ab36d009186014f4244aba686742016cf440aa15e82c678a7af2157cfafe6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FISSP0700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516f9a51f549b2db44125588535e8ed9542ddd78cd63c5ad85a6286afd12a7ac. 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/FISSP0700038.