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 0x6507c7cb0a466254f55a7938661840da4b9343ed0ddfa07d8ff1dcf9c9b13003. 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/98530d0f-16cc-425c-84f7-3c3e7911564b.json and https://artists.proofprofile.net/proofs/artist/98530d0f-16cc-425c-84f7-3c3e7911564b.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 0x9f1c48b8d31779c5fec635e7493482f38af98d4726be03ae39a26f60844da85e. 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/QZWFT2449502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6796726c57a6cbe15a288aba070f65b825fc8e9a76a0ae170b9f34f6413906a1. 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/QZZ762433644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6694a50b765a7b8cc692b67638c6e487a5f77ca5a90e73f72bd898a5ab1e1d14. 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/QZZ762433645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350da2ad8e77e1892e99527ac966b72d0a1612f422e8d0c79d4f8bb00c3888c6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:09:39Z), 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/QZZ762433646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694995daaecc73b8223d3fc3108e9834d940ae85f48c33a564be29ee2ad10833. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ762433648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d61dc9908d2aacad5feb9096df33bc9d54b25c7e03013f0e4ec5dd80785ca6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:32:51Z), 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/QZFYX2544554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350da2ad8e77e1892e99527ac966b72d0a1612f422e8d0c79d4f8bb00c3888c6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZZ762433646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1c74f0d322181c85035fc826eb80174dddd5813a7152f70d54eaa3f75ba20f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ62521785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1c48b8d31779c5fec635e7493482f38af98d4726be03ae39a26f60844da85e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFT2449502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c495866ea1d9b8a382e1225f36e922917874d6008077fecca7eb86143377b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ62521787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312a589fd46ed50ec21858e99f555e13a0954c648d3185966292496a3789bc1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ62521788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d23ac56238d02d855e1944cbbe70a2eecfb23fa8029e0e19fca48018cdc6c59. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:28:18Z), 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/QZFZ62521790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9020a09b41fc10c789c1b5120a57d3a3967db115158f2aff1c70ca6233ebe26. 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/QZTB42575765.