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 0xd3276b7e45b335382604896528c1ddc99dcb8f9cfb60ad0a1b25b4b01b381be9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4b9ee93-b212-4d59-97c3-72a5dcf44141.json and https://artists.proofprofile.net/proofs/artist/d4b9ee93-b212-4d59-97c3-72a5dcf44141.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 0x650124f41effdd85b2947328aff3f0ba13bea36c7e5cd8d526af78e2803d9226. 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/QT3F42449958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2128f74c9264f859bb9b161c9a9dd7dd3ba657f79bbae8059617d6471ca7b3d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:15Z), 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/QZFYZ2558241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07246116ded18253de027d15b7970b98eaec856a62076936effbbdef5f5fa58. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA72548398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8928dc0eb65383aa78a53a89426df1a2faae530561761c1f112704840f15b45d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA82515025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29609227d001048f2955dfd8f21ef8180b1be013438a48a4e449c56adc0dbb0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:02:50Z), 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/QZDA82526250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa01b40f81398e7c4b1f9bc5db36843dc00a2113bfd423a25c9aadcf268bccb0. 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/QZHN42580571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb4266cfb12332589d4b932f9ae4519d0cbaa1181f30e791e0836902bf1f260. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZHN72539466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e89d0c312838f3f021992a348a115a2e3f739ebaccc03af9867835d9dc009b8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZK6L2578351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fd07326603b9bbaf777cb5e2f887cf0bff65f5788ad87c9dc6864bad6f2ee1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWT2576762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbcc23cd3372c0b59d5f89e52a1540ebb34d43f03087c00d4ee076a9c7424b6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:31Z), 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/QZNWT2578887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb2a205ecb5f7b8675411bd0c7b87ce6b0d42a33d9e40b19b43ce78984e0ec. 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/QZNWZ2581996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0722bd33ae9c961add8abf60c10c958ea09f8d52a6c3988eb8368e31f975ad. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZPLR2567413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59079024ced63fd02900fb80d9679cc9e156910ef0cd8641cb2b526465ede4b. 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/QZRP42591129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5893f163da6ad52d061db6a4e337a6bed3e1d5e453f22cf52c07234827e4519e. 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/QZTAS2562147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482faffa6057d9d02b8e2b455d52867449ad33427e17a1bc2160e43b1aad4001. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAT2553653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa05130e430fe32f66bbb9bec6495192132845d557a59f3c17f86ffcc2eb83. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAX2531725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c88ac914a38d79b7e1b627785e61a3566aa15d10c469f2e7954a1dce19cd09. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:33Z), 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/QZTB72596969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7719e2c6fb03beaf0f835b0e4547d1ec162eb68e99c3ad29c7ee45f1947de08b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFL2568911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d8720565b67de37ba55181db41f837560415027ca90e0693ca69d4fecd76c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFM2573262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb132dac2e66320749ff98752c46462eea3982c72d6f8d8e4a8ef21e7726b9e41. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZWFU2518498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120c4eb8fbea2716107136d1f3368204cf21026055f95cd4157a67ba2e48c1b. 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/QZWFW2516200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa681162ac071cbc39b222ea3aa31627be406e7e0eee92364c9dc21a40ea2e37f. 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/QZZ792566785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a91b07eac6016fde6b00e858ae3b83c28a94336590c3e8920a00eba73dd1bb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:48:32Z), 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/QZZ7S2506621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c522ad28fae64c377dcafc867a75a658cf62939f1aa5778514e6d740a7a5d58. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7X2572274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92e02c025e5f30c48985de90e496e532d79ba26ea93e68b2e46f8a01976f872. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:22:45Z), 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/QT3F22517459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180040ed5e2c3826f094da581f288a8b8589c0e158cc09f4ca11166a45febdd7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT3FA2576078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ceef21a928e82355b11476c66fb666db577f9da69df0d0c939b6dce9fa273d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT6E72579050.