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 0xc34c193bf0184e22166eb8d1c0de18291b9207eb131c6a6f1d196f4641928aed. 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/bad9b22b-6375-4181-92a8-ba1736d6cb20.json and https://artists.proofprofile.net/proofs/artist/bad9b22b-6375-4181-92a8-ba1736d6cb20.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 0xb4fa5d75c6a1c08deabd40c073d4fc18c4c42da905524d4a5f392c425805b98e. 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/FR59R2291489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1708e227340ce13cfabd20c025beff1e888f3064c65e9b40759648e9bd20904. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FR59R2291490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83dfddcae19af91d7c41b5b75f393004f588dbeccac9f227a09a95875f0143b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR59R2291493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acbad63020ddf4ef45a3848470295919d3118c45dabf7d401f00563573270cf. 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/QZYHM2368350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c6851d8b075edbcead67e97a10c5f71f979b85eb45384fe808b58c9e7de430. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZYHM2368352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6718887628c7460b93356fb9e3daa96026a5ffc61adc31c9da433fcaf0617053. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZYHM2368332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fd20b084197a1b82c3b641c67a2252c5f5c0f25cdb68b910d9e10e2691cf71. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZYHM2368333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79d69da85e834ecab6fcb48e6f6534137329d3a7e66e28748c9462981beea1. 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/QZYHM2368334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2575d0507e9145d751841aa86996e9da497530977e55f0455c5d2538428c14. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZYHM2368335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d460574e5c215464ce3138387cf968270fe9d1a0da5410fcccde591e290ae8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZYHM2368336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6a62dd031b944232a5b3c3b94eee022813587a4949b652ef3d510079d50e99. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZYHM2368337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87599fee103a4cf7ccad00d757455e15b5bd76ee8c2ce8e43f1af8eb297d145. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZYHM2368379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359e1488684ed7cedd1653220f3b345b82671aec2fd338e7571304b67d66a833. 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/QZYHM2368381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0f6894feffa3e69222c6b7210af946ba05efc5cc1e2adc8bc300419ceadaa0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZYHM2368709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049de46c4c08be49eb46f3dfb552f53caa0758cfa5150689713619d1668d1833. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZYHM2368712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5a2e9c421c11b1cef9eacb365020860e6bcd1464af58c4f1f62755a8b441b2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZYHM2368713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40ca2f05f314d352adf71f83ea5c04c999ba14e67f84161d66f0814e51d8e8e. 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/QZYHM2368714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0285311c01d3d42c93b42ec119bff47550b5906b32da1162736fc42bce8b680. 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/QZYHM2368355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98387a19c206e56c771dbf733ff3a5e3b5361525d90abec7ff3e493cf35e570. 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/QZYHM2368356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e74736f4464eee95179b69da3f780fdd65a4382ad1d38a9652fb7d2019190f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZYHM2368357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aff11ca53c11539a92b02b838b3632a9ae53d28ffef48ca485a8c2ad0c144c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZYHM2368363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f021b60137542a8944b4f343e9826b8aca2a364ebedc6da01325a291ba59e3. 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/FRX282431251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308c05595fdacea6def87c0e2e60fc8e37421631fa91745dd85a7215fb6bfa62. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX282431252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87807b87824c9e3c8b0959396955c2d1b0db7b64f31846df1008c5a9c061a962. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FRX282431255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb1e765d2f62ed34c2954ee6a5091253aa246004089b6a8ca1aff0a06863c4e. 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/FRX282431258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8158cb7c3e1c179b1f8822304132fc7bb0eb496f912a5e32a259bbb98677d127. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282431259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc523ac2716d13fc8f37c136a3827bcc60fc286a62be67bd452fddb1720c584d. 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/FRX282426635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5ccfecbfa21ec82ed638556033a7c3eb3213b39bc72262ca200369886afba9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FRX282426636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0b1904d164d56881fec45172218413afd32f972894e24d8597165db1d66d2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX282426638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493260d17b53871119622e2535cc66f13c222a38fafe3e55f7135a557b1eb29b. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/FRX282426640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6592439c0ad0490d8365fdf0fe202c11f1df249d233e2424d54a5baa7b6d82. 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/FRX282426642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ef33c590c3c62375d8e138dfa30159ee7d782447b3555f0495992f5655050. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FRX282426643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82533d9d5fa205d04800bd335c1e16c77067b19e678162a518cd8c012e384dc1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FRX282426644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cde45a5f55c984e20f77986b52bda6c57ee9a1b52dc8dd9b79e468f0add70b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX282426645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d62ed7a928a92417db4bfaa5375644b31aa0c04b53e834ef3577a813639ae6a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA052541723.