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 0xf21d024a7453faee7fe0559f56f16821f2b997166b60bf0134b62677cb7b8190. 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/dcf5852a-0ee2-49e9-9bbf-fc4906affb42.json and https://artists.proofprofile.net/proofs/artist/dcf5852a-0ee2-49e9-9bbf-fc4906affb42.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 0xc061a2b0ee97d4142056b75808b66d6babb535e9fadf1894505b9d67c592d7d9. 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/UK7EC1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331d3516cc86169106dac9a88161134ccd7aef0ce56eb4eb11af9d77a7f687d2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLCK41035340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3034f1bf6c53aa16f7df389abd45541110054ce41fb802558e3da2e83110e9fe. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NLCK41043827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14285d505bfef4c2347bb764f5b8de131478751ce5f653011077ed6a257b514a. 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/NLCK41043824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0993c226c2a72a9b71313e787654b8074b6d1fb97a98d93afaa0637cba468101. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLCK41044430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e577b6c4e87277f97366c2729a20e29467bffaa9770d7211b526d96c1096fd2. 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/NLCK41044432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb12e939003148cdfd9f8f872dc8e61f7e1b4a0572100a33ce921ba66b02b93. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NLCK41044434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a0ef86ccc4e159093aed4aa826300440e21fe81b3d4796d80acd19c6aa794d. 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/GBPWR1600708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa300db889416381358acb15888778c1d5800be643ccbcdf0cd2cb6150a25e5fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLCK41054680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2f464c3278ab04a69d2589fabe28bb503f147f5c35cebb85eae8cb22d1b1bf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBPWR2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b13247e1b77bb2d258ac866556d8f8039704fe2139c8aee8c6708d740f3366. 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/GBPWR2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd292ccefc66edd34f14aed36fe468a04b08a4cc6d023fadd6c2fb211efc8d46e. 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/GBPWR2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b2f41982f6cc308185419f2c648091bb060567ae730e7c21fd01d01dfd2df8. 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/GBPWR2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd292ccefc66edd34f14aed36fe468a04b08a4cc6d023fadd6c2fb211efc8d46e. 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/GBPWR2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07302fc5d082a22bede38b70563b8955382b9190e0f1ca76b67b77521ee585f7. 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/GBPWR2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc0a48bb561bc97662d3faf84c25ad11e574f02fc2e297e9a3872e3b963bd5a. 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/GBPWR2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72292d97b5dc31bcfc43d4b59a86ce55355a18ca397390a96ca012ee2f1be2c7. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBPWR2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cec0559700c456fa38198e6840c70f310aded5c87d58edbe18aa021ecb2f120. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/GBPWR2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3923a7d19b5694202efcf06f7071f4158b8807745e9c88ef871821fbcd85b1d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBPWR2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aaf5bc574f6009885a228093d986f5fcbbebc48747b166adada1dd80f0b1d5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBPWR2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415a147c87b8bcc132c97bc3fc386104b54ad81f307def3bba1061917691930c. 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/GBKQU1974434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e32ad9e2b2c1aeeadba6debcf3f1fe7faa1fba4dce9e0d3297ad2d93f8eda69. 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/GBPWR2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cd125606097d0073dd3487ec4d382ee1dd3de3bd34d051a993698d81abab0a. 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/NLCK41026655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e32ad9e2b2c1aeeadba6debcf3f1fe7faa1fba4dce9e0d3297ad2d93f8eda69. 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/GBPWR2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ef0428537785adc398842645ffab7bf730b6d556313a1eafec8c6413f2e152. 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/GBEWA1905791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea516bde210470451a4bed18f6d1156a20919ebba213a3bf981869ad7e966eaa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLCK41066963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa300db889416381358acb15888778c1d5800be643ccbcdf0cd2cb6150a25e5fd. 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/NLCK41054680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0410d963e944f15b39964fb86c4bb97c6ff6e7e0306c4b9affb049eb3a5eaf16. 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/GBKQU1560647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46320ab5707de5442912eba23855762c9df44397fdc0130b18b000227f3b6b26. 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/GB8KE1358212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42785577bf85365c293060ea84b84cd8667767e48b0e38f508175e28c7429740. 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/FRS182080547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea516bde210470451a4bed18f6d1156a20919ebba213a3bf981869ad7e966eaa. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLCK41066963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237895a3ffac3591612753ce969a9bde25637ec6a44897c25fb444210d7ae84c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLCK41041953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadeb27cd707d9cdfed2ffeda1c3ad349344e1aeb84b7bc9626e6e3817d3fb58. 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/NLCK41040191.