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 0x0fc8e4cbcd7e057fd21f399f9252a224aaef68bc6f8b5e2daccd84d8e35601d4. 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/35a9fc61-4769-41df-a77a-5d7d03cd02f9.json and https://artists.proofprofile.net/proofs/artist/35a9fc61-4769-41df-a77a-5d7d03cd02f9.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 0x99b2c01e31f9ae958f6bb1d12a086dd18fe22bb8fffa2c3765fe187fade7d7ab. 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/UK3A91300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df6857eb9d6a7fe105c8cddd37df36845b536e0630e0367570c4d6b15fb70d5. 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/UK3A91300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99854a1704b2c6cb6418ac60b227701ffc425d0e8c6120421e903868a527d9e0. 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/UK3A91300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6b53a40a21ba67848c959c61b15118ac653f98fda6390d8aaffa412182ab9. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UK3A91300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf3b91e46602b84e575cd44172c6f8e337490e1147036765e132fe98728c4a2. 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/QZ8LD1762344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb57ac987d89a85b88e1de719c7283685cd309e590eb7a6f5a77e7c7f635e0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLCK41058593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d47cf2687ab5e760b2fe08e35d9b0308da5478d3c6b6dcea350c2bd19e3d0. 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/NLCK41099886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e0c838a764f9172d59ce886baa97ffd386319894955ee956162cc75a29c139. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLCK41099887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6731ca812886187659e73d99b58b015e910ecf08477660811aba3cfc7ee7364e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLCK41099888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7515294ddfbfdde22cd9807fe96d8c006b08b6ec063e362af9a294d428e5bc65. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/NLCK42210554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e0c838a764f9172d59ce886baa97ffd386319894955ee956162cc75a29c139. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLCK41099887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4cc4392a0a885f1077424614c5b97f3d0d8b8179e1c13246b93df6c29b4a2d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLCK41096861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d47cf2687ab5e760b2fe08e35d9b0308da5478d3c6b6dcea350c2bd19e3d0. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLCK41099886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ba43feafc5479adb8982f049fe335977b7b6576ce5eaf9eeaa132cb9a2c1f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLCK42210558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c4dbf58ac9b5ca2988b8c9e2aae2683502a0d7c02ee1210e40191ab0151f9b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLCK42210559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357f9b4611bb68a2243c4f8b20f7eada4574ecc053535105bfb292ba6c96fd7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NLCK42220398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9160e89650a798d323f8a24db7f0f0aab54a9a57bc8af3ca40085c72ebda74e. 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/NLCK41072241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357f9b4611bb68a2243c4f8b20f7eada4574ecc053535105bfb292ba6c96fd7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLCK42220398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18efd88559a22707e79e8ab7cfffa110efe2104eee705595fe1aa70f5e1d5f6. 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/QZ5FN2095332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9160e89650a798d323f8a24db7f0f0aab54a9a57bc8af3ca40085c72ebda74e. 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/NLCK41072241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd56687a36274cf783d58c0473ef26da9e8a2a87fcc88449f46ff17620e6163. 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/NLCK42228724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fb9b86be72a6632f232f3c8d2741e6066b8eaa03534a8c6b2aca82605d186e. 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/NLCK41046414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fb9b86be72a6632f232f3c8d2741e6066b8eaa03534a8c6b2aca82605d186e. 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/NLCK41046414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf259cfdbee4ca38bd8cb9473adcaddd58548ce21a2a09861113a188b30bd9ed6. 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/NLCK41054213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d17e5ea72afa2b7155859a63348845be448588787cb76029d5f7f57f043535f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKE991700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04530b8f7b1528f61de2ee1e3fbbe7ebc1d54663a0db02a2e91fda36edfe465a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLCK41043129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b56f87df8c77e377d123ff67f6a733dbe5edee282f426e60e5444364bd73e3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN32218925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d8f728fb01f7abfabfb81d5db253f90b9f9714d464837f7410f28ca059142. 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/CA5KR2271779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d8f728fb01f7abfabfb81d5db253f90b9f9714d464837f7410f28ca059142. 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/CA5KR2271779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd56687a36274cf783d58c0473ef26da9e8a2a87fcc88449f46ff17620e6163. 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/NLCK42228724.