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 0x4584efedc83db72381e6da9bee9904ac8ae263248852b9b25f2f5bcd81536878. 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/3ac7d9b8-1f6e-4557-9d63-5a7ad673b878.json and https://artists.proofprofile.net/proofs/artist/3ac7d9b8-1f6e-4557-9d63-5a7ad673b878.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 0x0e6ecd6904996488400cc3d28db6c1c1616889a9d156ce969a5b7d216398ae61. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:47Z), 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/FR26V2040035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bca4b5fae6f6f429904359d26c005798894f42a6d02b95f53adf0f28f37b8c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4CP2413531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84709386cc72a2f75defbe455d9b34948642f57c16cbec7cd9d1f7a8fce3ab3f. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/NL4CP2413532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519b44cf5b6b6be30893e4df8c1e0602b60615b5e0208d6496669517e66fc27. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/NL4CP2413533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4a263945206e485d264f2de49d9df6ec8a927ba960587363a417661826a617. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL4CP2413534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842bac7db99f96012428b62fa1aaad37f1f572d0aad90ccb8e4013bde655e5a. 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/NL4CP2413535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ecf6294c4ca658bfb6e61f73df06766c1f5c7feab231a5d3dc63e7975d7c75. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4CP2413538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7c014490be82758ff4801caa69c919b7f2eaab7be40f09f4888b3d028000bf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4CP2413526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef6401c71ab927ea7f9bb60462531684ca12f5329025a31d744c3155d8a3f07. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NL4CP2423539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7524ac76d05e2a494fa5af4fadef22f78eff401af02a8c50b0a236d710765a. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/NL4CP2423540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f98dcb47631a86b100c24e3f545b0cc9f1881db9295f89ce369699c8ec8158. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL4CP2423541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27893de7ea1b135e5bd45554fb0ef8eeea99c25e5da5ace7d74c4cccadec8f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL4CP2423542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3255b479c9c4a462ff189c05abdfeba5800b3968fa1d5230dd61eb8f407aa47. 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/NL4CP2423543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7da6baf2176e9e25f236a12d6e8a9ceaf291ae201a63d6a80cc07b9052a6ed. 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/NL4CP2423638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dc7a5fcd96f4d3967cddfde2deb23738b03fd360ac548ec4965e6f98d1a765. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL4CP2423639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c43b8d76796cf61b0d7120d9989bc17ac6e772a0eaedcc5c6a5e11568211b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/NL4CP2423640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3533b0fcfaac6a519a968e4612c89218d85fff3226c3c95904ebab1988d75eb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4CP2423641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696ceccd96c38b12466c709a47bb06abbad90de87eb54163167a8f0b0a9c07fe. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NL4CP2423642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1231d5949270c0c8656d87f569404982e9583e63f125995acce7883a525a9a8e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL4CP2423643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a3ba555248ffbaa1dacd5728aa7b3e44c2f229bda18224720c610bd0a4eb87. 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/NL4CP2423644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65e63f6129646d0aba2cb53abf2dbfb345956f0811b9ff4059fdcbc29955963. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL4CP2440398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26413addbac8602d7bc8adf72ef2ee697876086e9853b83655b9454619b0a157. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL4CP2440399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d60cc4cc6d1532d2666dec956abe0bc89f7276dc1524e1ced9009875181a17. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL4CP2440404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b16372e4f18e398670a412df0c09dcd873b3a1d5ec8bd15c3bcae9bb2f9a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL4CP2440405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda9e28f6cfbd4898f034903eec5a98daebeacbd4811759078445c8febb38aad. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/NL4CP2504600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a6c5f18561ef7d2344f0aaab7e93f527c049f71484aed8a9d32d6fe188330. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:46Z), 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/NL4CP2508819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5002c4cfc786a7184743c8af4502c0297838a1b0277f18d15b7ddf1d4647b637. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NL4CP2508823.