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 0xff6e80dc0bd369cf89affef436ba64189ce20a094d80a7cd6dc363656154e095. 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/b6f88423-fd47-432c-8660-f39670372b81.json and https://artists.proofprofile.net/proofs/artist/b6f88423-fd47-432c-8660-f39670372b81.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 0x4404493c95d338cd2b236599aef7c7a62318d951e08b14917cc7159f9d032163. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZJG51710768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d3be4a763d87ab6686bf95e955cb36e45cf0409909ffc148a560b4cb99a6e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:16Z), 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/QZJG51710770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5104fb4dda36875c1f5ef91c94415cabad0e6eba474f1abe032359db0444b44. 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/QZJG51710776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d833a1fa8f1f400abb4c8567f9a152ef4cf0b16218d2759e75fa64b537e33d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNMW2133766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38550ae4e8b01e562e3b4ade9bb5557d456e59c54d2f7f87701e8c525d42747. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEV2106858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b8279cba097dba6e1df9660934d8f759415c16367b8685d8fb683a53f539c4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMEV2106859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a4047f80447e8ffc14f5093431dfe0356413dc52da11004173ef014fe50144. 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/QZGLS2274298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1441cb8b5ee441966422c59528a26c2f521268c544c8a55303171c49ae87cd6. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:23Z), 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/QZNJZ2217053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebdb8e73658e4a4a785f41827141aa4212644daac9ba6e5a5751447534edf4d. 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/QZW9L2204291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbe78557c60393854bc31e7729c020627c115835cfdf65132398bc853f581e7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZGLS2392692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f98d0d88374a9d2a7a14038e13534f9f0352861af1718c8a8fff07e1cf6032. 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/QMRP82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4076796f31cd63720890e63b1a1da116b28c7a2708d6e446edaf40ddf586003b. 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/QZW9K2356196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c0b61a2dbfa17d6bd4b60ce4ba058f5c0571c567f3aff888d97501877b6174. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9K2356197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62c7edc261be51d1c9a9c738ed96604520504afc20ac71750c5878a0c43e28. 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/QZW9K2356198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf6c243a5377f92d252f68ec1379d9d6ec87538f6c6b31d7af21799cab2a72b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZW9L2485065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6281632c7cd0dccd6bfed6e87a325e0aa8f1dfc832c6c4f3c54947df363cb1. 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/QZW9L2485072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333776bb39302019b37270f05a2de94fcdacdec6fb2c448bf6393700509e97f1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:44Z), 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/QZW9L2485075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b8765f2f45fbe5512aee79b53b77aa3f29741feb6fa3374c78d3a4f9947c79. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZLL92594169.