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 0x2e402c68bb9de1643a616f08895fa592b1aed02a484da691c6ac0c3e24b61cc2. 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/813f8f3a-ebdf-4540-a3dc-449325320b81.json and https://artists.proofprofile.net/proofs/artist/813f8f3a-ebdf-4540-a3dc-449325320b81.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 0x6de98f0bdba16fca59845a1ea64f50cd410e6cb633a231ce2fead008ce000d19. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZL5N2554010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6ec0c2ac7f1cfd7600c9c0612e51ddbaa0ebfac32dce56bfabd2786a159bd0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:14Z), 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/QZL5N2554008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9632e1ae7e953eee9ccd1080307853274dde0842d8feb46e861e53c2646f1c17. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:01Z), 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/QZL5N2554009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ea950ac4a4046bf10893fe7c26e46d18cb20c9328144b6199eaeb5041221c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZL5N2554704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6d3d9844236adc0b519f6b11908c2b8862bac0d22a00a72c4a9d062272eec. 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/QZL5N2554018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fbf1fdbaa1683ead75f9478f1278bfd67fdff95fc152169751493686b5df4c. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZL5N2554014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378da1e9c00661bcf9482095c88317f6791ded7465f32fc08277057876e03bf. 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/QZL5N2554016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc36a159588fa52fa2bd7dd9789b78c045fbe172073f429aa484db12ade2df95. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZL5N2554702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f9e5cb6893c04c678f9028743b95565f8d7a785cd4b12264c37d453cb809b. 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/GB8KE2507423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085970f241a21b90f3358b26b693a9f5e586221eb1de373987bdcee445aa13e4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:56:38Z), 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/GB8KE2507429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1e6fc1129733f4cb1852b8ad2cb76c4ea237213adaab331e700a5963744c5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GB8KE2511575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287f5471c7b37fd6946800f8e0d6da0d6b15ccf9b72d5a833e8ecc45cff95bb9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GB8KE2513637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4f32253bdb5b2b64776573a5d78e30bf12453a1166374879ab9931ea5d9bc. 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/GB8KE2518661.