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 0xec1ab3409de93f340ac0adc60c67a08743b72255b748e9718493a235de11b935. 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/31a5dc76-9b7c-4ab6-bf34-f87fcac21a3c.json and https://artists.proofprofile.net/proofs/artist/31a5dc76-9b7c-4ab6-bf34-f87fcac21a3c.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 0x8f1635cb64fb02a9c5813c099961613a860e5792dddd5099e8baff60030ae321. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PLH361200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117928c5a80d020762ac7d77c064d0531cb5fcda44f0383706a3767988ca1306. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:04:51Z), 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/PLH361200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce45fb65129475a6ff2d413eeb00787db84b794e0e20808de4b5bae0187442f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/PLH361200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ce110885f4c1ecb2947a9cc5f62b94e18d1d71f1b65284d9c16c2146c1e18e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:35Z), 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/PLH361500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c1b5e9cb494a231f8c97312cccaeca7805e0e0f061eab89377e400c1ec7f26. 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/PLH361500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d362324633e71d0d7b9f0af513790a744b8d74ca7dd946863aedb9c921e929. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLH361500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d346b33195b715c1312c4cca24ee8f0f78c250081c83b52b6352ef273875594. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLH361500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b8561e59a83a7ac18513c31916a3e8c136f501cdc87904f0bebf70420bbd50. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/PLY831800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdf3c23b765d8a135866fb9500f089814c028233fab553d8d382e3e07b18138. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PLY831800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ddae1e62f2639ba10c57ae0f883cd4e95de3ad8bc9bda98b2debd962ba1bc. 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/PLY831800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088eb68bff09c9178ac603c4eeffad95e8c07f1df50486e748e182e2c013405. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:54Z), 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/PLY832000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c4ba671cb6f6ef57c8e7586b6b4aaa1adc91f52c7a6e0f0702cfae7ac0487. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PLY832100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8380b7e3af1d181fb3a46183ade38dc9544e7b287e2d7994ce6cb8f7cf724ba2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLY832400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c316a4c6b30e40319ccb18c05c19d768143f75a080a774f73d2ddf2123eadab. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLY832400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52908f04e2678978febb26b199bcd2880d4eecd895ee206193e1c08830c69a7e. 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/PLY832500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52c97c542d98e49c3c7733891d537131795bcc3718903e8153f4f1ef3e8e50d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/PLY832500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae63fe0aa6898ef3ad2991fa50da35d07936d4eac79f4f0c0ac845d38bf8df88. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLY832500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a32829d6458310a975fb7c4e55532585161e62c25b0bbc9cc1abc1e4255c43. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLY832500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b1aac1556add1289a9f6f751cdd9da9fd2fddb1026c85d615b3e2aa544d54d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:00:40Z), 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/PLY832500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036ab1e25f45f1f9346b64d698c19293b6a4b3713f3c0665d00831d154d21ff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLY832500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b601e1b5c6da638816bfda5c94bababc50704b8334d53e3242ab42c07dbabd. 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/PLY832500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c361afac33831a55328afefde698fede25da6f41dbae5e7ae2dd68d06eb92e9. 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/PLY832500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e1569cf0910faa2dea544bed2518ef0b3f39a5d514cbebd5c947faf569f41. 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/PLY832500012.