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 0xd840b821a568ae4a3ea41c727e5d78faec3914dc0b8a87649ec2a889d0242bb8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d8af1fb-e68a-4539-996c-dca551b027ab.json and https://artists.proofprofile.net/proofs/artist/9d8af1fb-e68a-4539-996c-dca551b027ab.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 0x37723ca6488aec7daa04d2baa258846603e13ed1ca0dfdbc4ef5b71349b69311. 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/ES45D1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb177494415063db4deb6cda50a141999a285824429988a7d4a8891f0551e447. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES45D1700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec728792ecc5a320f7aa29b15ffde77fa7ab67d66ac7c2c2bbd9f1780a96a8f5. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES45D1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66ce78c19d94c05db04ba836d991ab1cd165cb2bf53d18149bd315054724a43. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ES45D1900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4810d8e96e0316e7ad195e4cca2e1fa80bbae07cf0927c3784692fd4267af1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92181060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf060d99d734d70c9262fc79da4fbca1b1f57105e43d3421d36223fa7f82e1cb. 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/ES65E2200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf014f6816a009a8e1911cdeea0003f86ece8c74ef6b8d123c152e3f1542d1b65. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES64E2202951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa382f84eb5c33c569ebd71ce2e7ef7f897cd06e9a6a464e1d056f67e911124b5. 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/QMDA62152578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc36ed8d4b3a30bf0a35c1572ac4d9fbc404190cba65d6bb3b03d7d07f36b54. 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/QM6N22193127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e8671d0cb31e1a75b00b4faec7b7ad352076e2f53c15dbf92c3fcd36186f4a. 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/QMDA72168701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf060d99d734d70c9262fc79da4fbca1b1f57105e43d3421d36223fa7f82e1cb. 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/ES65E2200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5776a9be7237c164765a1e2704f7961b2589a4cd8b95abd6123e71da42d955. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES64E2301364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4810d8e96e0316e7ad195e4cca2e1fa80bbae07cf0927c3784692fd4267af1. 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/QMBZ92181060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1707611da76857f1f56b3f4aec96fd2b1a020210187d70ed9c6f436b87a7c30b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES64E2205554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a84697e39bf20171bf9fdcb7d67a13a9760ccc3be029b87869a09387f75485. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ES64E2307117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5bf65d162c8a54a73bd4ff06f2e0db32b76a81d44bb8f877c067c26a324944. 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/ES65E2100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac075700368e6d0f7e383a20791dcf136e970ded0dbc90633fc2fb58f00b46. 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/QMFME2102031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e8671d0cb31e1a75b00b4faec7b7ad352076e2f53c15dbf92c3fcd36186f4a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:10:04Z), 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/QMDA72168701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8c4af6d6b725e7d32744ec89eaca9a77fb1ca2329e9635a729a37c3d866a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES45D1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f04d9f29a8a9de43e50d7a635500bdb5d459ee306ba68549c5241d8a0541094. 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/ES64E2307406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa699eec7e049137ca176d700754f4df8edea139cafbbfcb08bb2dfe4b16e28e. 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/ES64E2307408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2870db0388eaf148f7c1e366785512de85774a534fbcbcc607d146e194c9292a. 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/ES64E2307409.