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 0x89176d3a1811d21a054f412e600783b4e9e675b0b9bdb8ddd6c973c10a4b6971. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23456ea3-5ec9-464f-873f-fc20fafad070.json and https://artists.proofprofile.net/proofs/artist/23456ea3-5ec9-464f-873f-fc20fafad070.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 0xa1f33545c7111a94c6ec2894ed335fd491da4544cfa38ce59f9d76610f02413c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLZJ2271086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ba494c7db18fed95388cc7be5ccd2f82c40d143191f71714142e2cdbc41e1b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTRX2225484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184668aa16045d8a206deeb0de3cd85898166438550abff8685070f9bdac6a3a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZWDE2258377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3561fbd4fb42e9e65c887ee3ff6d1344c18e1c982508d5f3f3b5aa2290f485. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBRKQ2316146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6940151773771f05400ad697a369a4e9f8f7418c859dc84216fae2de9883b891. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWV32387198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dab72ce17b7176acf989a8fb18e54a28f20daf707282550444aa161eaca01d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZZ8A2401877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ea162a409b110c22d603dbbf97d638462e99d1167119dff1175352de231b0a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ8A2428056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7cecb9e6acf539e51b2091a89be7c0217c35910dbd5df88dcf5489137419e8. 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/QZZEB2488981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fd27b68d9bd68ecd2c31697c3db81775b5815e5c8d54b9a7dd00bdb67f8d7b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBWUL2566071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a099265f1d56b8753207b1426648bf594072e58c4415083b5cc2f402934579. 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/GBWUL2596050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc038ec0368d841c50efef44369b66f3740a0cf87f0cc1b1ded9a4fa388e43776. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTRX2528961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b3fe9c2f49e7fe27ae86e0eb01206faa9367778720b8b3ae21bed201be10b6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:36Z), 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/QZTRX2568307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536e3d818f97f6c54de341780ab00c84f8ac98341398524959b4806b7dbb6657. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTV32521905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ef9739483694f6a2719b4b84f8dd770939685f1ee2852c3e617d59327406a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWDE2555955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f734cb778cc42a543191e7b13948947e6682863c2d5bdde6df3c9ad99fe119. 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/QZWV32528207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ff6493df8c7c5388cae1499c74248319e594143e85fe74fc08cc1ff8e9931. 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/QZWV32553668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfae8ff5220b22c4b20258b5a11f88000666bc04066f88c2aa5ccf8a50fad04. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:04Z), 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/QZWV32593536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eadd3d3d6cdec5095d0d388c22c20b15efdfd73a74b69b99dbd7892a749365. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWV32595734.