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 0x77a3b1136191cad8c6906b3b0904aa3382437e16d67e2781ca71b517ef5dfe7c. 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/3b0e3b16-8530-4d5d-a754-f7ef31092795.json and https://artists.proofprofile.net/proofs/artist/3b0e3b16-8530-4d5d-a754-f7ef31092795.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 0x1a9e48feda811453f940b8b236d8f5602ab40d179bd3685d868d56f8be138ced. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNB82463922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650aec220431bf734d4a7f0968824eda9c3c846053bafa3b8f931c9429c87f90. 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/QZNB82463924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627274355c1f162d458e1f48fcb2e5bd2595ad17acfaccb3312fa36959133a0. 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/QZL382413739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58315adc6f5b72bd06544a50c170b73bf0e687dd9e9d91e044ef65ce158807b. 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/QZL382413752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c64a43ed55bbdfc896a7aaf66a8509d8f6fc71751eaef2b3d3bde886c88c9b. 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/QZWFP2303667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe947a55b50e3597e2bc366010f8a0e8fd7e804b5c5ea74f240320fa05a619b14. 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/QZWFP2303669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aa4b90eadb7bc7816aeb83ad84f7cc60f4023b796479bdb307182bed6639e1. 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/QZWFP2303671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28773fd5dd991f8c29bf07f41d4cc2ff65d3e273a34ad9f7dd7b4d508730806c. 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/QZWFP2303674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338dfeb3c79453a2c0d63a635c321f3b4c6a45fed539c9bc4df18bf1f4444974. 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/QZNMZ2390149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd5d11813c819f8789ed0c9ec7c59a5c3959fc7a3c6ea9ef3026c6be978100a. 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/QZNMZ2390151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6573e14237ddc6ade78c8a9e1048503fef8e399d48d64439e3cf2a886d699fe. 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/QZNMT2393056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb3e9074644081c71b2e236f20f15e994f49994bfca08a141754c566c383f7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNMT2393057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44678e88a2d7ac729f68d11d48e21907746a56e849c7c2177a01cfe0cbf89569. 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/QZDA82383500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afb9fd1e48dac1c8426070d9caa23b46032aad3e2b39605c7d9935a3dd18fd9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ22338900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84357164ea988b86d8fdd8a6d626e2920ee0031f16158c110e324dd16d1a0819. 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/QZFYZ2382314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b08bf0856752eb1b94f41fe087a33c6fc9e9d9ec77ed2675f4cadf241d195. 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/QZTB22269223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ed90ddcdd34664727dff295d72155536877c11ee14f6556dc74712119dab82. 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/TCAGE2202151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85eeb4c4ea5a39372da65ca877b2cc90a4b6bf48180c8f5376d623bada73d45. 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/TCAGE2202164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746b282db8457d097b068618a316b6a3012f50ac9e024419fc86c90007c70a3. 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/TCAGE2202172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33f072088f06a28495e07c806de977384437d748a43f9ca17c8ac68fadda6b3. 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/TCAGE2202186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5af83e83fbb47e83715ff1655c878957cedc99445a59deedee67cb282018c1. 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/TCAGE2202222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e76b293879811a0d65a53946f7d1846cfeb3ca7a11092fa002421a2e5320e7. 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/TCAGE2202259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cd1cbbfcb6f898bf7da5ae6d77a9d121ba82b01205dc6ce96a38b82ee4032f. 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/TCAGE2202263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e265309ab1c10f9cf7eec9f1bf576c76a639f1fce2a041ca035509a57b6945d. 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/QZMWW2161115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d2d91d55c0f9b5494829af7b4e4c4c343767e7e47cf519463f1b08b4b7adf9. 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/QZMWW2161116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aa9a06ee790acfe32de8dc16ca0d6abf6fe4c9f1701a6d9d04e47d8dd860fd. 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/QZMWW2161117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20037d6b95781d3517942a12847623af895d77241574e68feba361a556a092eb. 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/QZNB82475456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec075e47bb8779f4ad175a9cd924881830cd059fcb237879858e4e0985ad161c. 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/QZNMX2306089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2094f9d63925f0f150c20d71b1da2cfc71ca56a8fbb50d4acf95f127b97e2b66. 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/QZNMU2396194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe456e17916f0cdbfac6bdfa112b7d89e631e7ecf4061ccbb276ada4a036d4f78. 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/QZNMU2396358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd116bc53e012582606d5ecdc1ba85caab6aca55ad8c4fc3049f2307620f3a4. 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/QZNMU2353432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d1c6bf239279309beac8885720dccb9d266e0399cc107cabe2fc448712e77a. 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/QZNMW2250895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed094d6a9f1625f593148d75e238f2f3e2afc0a4459c4815e450713c2e0cce0. 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/QZHNB2009283.