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 0x27536cb44785bd3b56d4ea80c87f5afdbd08bf8716deaa3140f18ea1b57cefee. 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/da973714-d286-4645-98e9-3309b7060289.json and https://artists.proofprofile.net/proofs/artist/da973714-d286-4645-98e9-3309b7060289.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 0x0772cfbfe8e0e70c8d127798433a363072337d08fbd11e8ea256b543fd153c6f. 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/USHM91301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9290cc6e708a4169a9afa9f0f2cea9038d4984b164531803ba213ae72be15792. 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/USHM91301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03dbc86d636423524ae95af94a057974fb39b526976f8c6ce14a5c04159ce28. 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/USHM91301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc244b4ac9611cd954f73d3a117946c45b05033b647d2e04b561c5cf6c9423d62. 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/USHM91301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1751a746e32dc6b379bb0c0f9be3eb17b82e48be79b244475e32487006304d. 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/USHM91301254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b40f733bcf663969d7a3ce493f819f5574c9cff4c9a0659f47b7b02e266a8b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM91301255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47485519a0edda5fa0fdfbe21ee3aa0b2dc36e442aed69231267143d4ffc1461. 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/USHM91301256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bcd7b150a9cd4668e5fa3adce053e9a482866da5b178d6449788a661d1b946. 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/USHM91301257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fad5f33ea20a22a35690d3710eb6e52971497bc451e97bda38fbcd65cb42cc. 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/USHM91301258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9316b65a652b0c9397a9ba3529d823ed9ead6af6cfd6ecae8fc7ba997b91e6e5. 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/USHM91301259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b0a48c70dc2e5b357dd99c536dfc6285b04bb66f2876e172b84d1418b2aa2c. 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/USHM91301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbeede4520aeb56c0d78510d5ac3c05c7d7640f47e2a992b47122ec7bf3949f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USHM91301261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d08ea17ba540be968c5abd9d3625d23db0e1d18601ead523d02d6dd5f2b78. 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/USHM91301262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead6cc3184aee0542cbb100e27c1f3fea6c4d2b66e54972187fbb74e63e6200. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/MXB711701257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2281a926caacc9b5b900c96fcae928a0d97e4abe9a2529896bec19d5b677d. 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/QZDQH2413137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ae1ee0692a9bc3689dd95e2c6996815fea23597584fe3982c654994d19b7e1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/MXH152400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c2b405dc5956a952d399a6c5ecf625f78eaacbfd436c65bc03ec7f16dedb7d. 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/MXH152100335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead6cc3184aee0542cbb100e27c1f3fea6c4d2b66e54972187fbb74e63e6200. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/MXB711701257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c21d77fa7ff34e302d823dcea53e08a5482c3c54967950a4ed91183249891. 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/MXH152400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4beaed1765baf1a65a48f856fdccb84fceb04aabf1c26f68f39230fdbd80bcc. 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/MXH152400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecb84978d555f9c32de4a938a44198ac72d3bde4a1e6d0c78ec4304b3271c0a. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/MXH152400208.