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 0x63aae83a2d931d3fcc64f8a18e55ec5ee2701521d82bb11e936350a497be6a0f. 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/28160fee-fdea-4796-8523-0f5388100898.json and https://artists.proofprofile.net/proofs/artist/28160fee-fdea-4796-8523-0f5388100898.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 0x11d02e0504955cedf9601a8c4011a25798a556d4bff224d704a6e9822e4ddc9f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:14Z), 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/QZWFF2319980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7369d774feabc7534cf9035494fbcee8b2536fc46450bcd50d573e73ece1e2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:44:48Z), 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/QZWFF2335249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14326bfecdff1c854c5a8b37c94dd6ddad7ab2308478d37986c64c88f7bee150. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:46:45Z), 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/QZWFF2320010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f96ff615e385de849f7576422306b73b053342b97566e0ac9e5ec3a9040903. 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/QZFZ62462326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fb72802066eb98333f3683ce1da1938d6aadec0d18d13947803afed9c00da1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHNA2439099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e6125c6a3d0feca718dfd0f020c8d26727f57de7bcaf2fa86bfaf07bc259ae. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:51Z), 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/QZRP52466198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb09523dfbe5edcd2bb7712a6f01d44f03c3c504095a40d60fb559360e2e18e. 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/QZTB62440295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97af15883affdc95311cba6fe6ff71299f90bb01665c954784a81a7e0422ba23. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTB82462564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1dc88a7ad6d4af1ba169e5de586d4c8afca249618598f165abfaeb8439e6c1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFZ72540851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6170f0dbc9a9d8e8708b29aad7599c84c9ed69caec3efd3d1c246920f241a67e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZFZ72540852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30378be290ba888618bcd34b6fb5221173e1d68d0f7ee62106816816089f9bf. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZFZ72540853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9a7fc86b6c473657cfd4a24043e4c286f921004b843a225be057679b962348. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZFZ72540854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307523db6d5ff8eb447bde0ac1f532430b9b0e53e672cac6b7a2cb4d7b8fb65e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAT2500877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276bae4dcbc8526f724e8a99d537ad1cdb4c8be95f2ec9180a7abf9341ca4be. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAT2500878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda08bf85cf05b78701e742280dd9b398aa9a0b4496b485a306d0c2fc86d88591. 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/QZTAT2500879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2be214a1e1ad0bab1e10c32af5f6bdf9be9e74165f6bcf4011256832b09093. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTAT2500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037de1d87bd4d7ccb19e6d9bd4b601424e2c52a59d1b111679865ede6ead2b59. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAT2500881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b378827e8e4be60782a157883aaa9ccfdb141b58a5f2774a83585436bcf7bc. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTAT2500883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287c12a4bcc11ece3f04a9d1b519e4533bdfc87171d188bcd2d82a1674bccb40. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAT2500884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c0346448e3fe7e7cb0f464d55218101561d0f077e0adbb28d1e7c35afd90d6. 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/QZTAT2500885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aafd365f42974cc071e7eee5eed74b3dd0a715ba480bda11e7a30a2af259bbf. 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/QZTAT2500886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb90a285e7b3ef93b9c666162a5e4bc100e341a453bb024ed7f0150864d4bf7d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:43Z), 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/QZTAT2500887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9f490c1ed7638fcc595bb2ddfc5e58d42723cd7745437aa3db90ece221309. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:35Z), 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/QZTAT2500888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5589ac7600d600023a0bd982690a78db27499c84cbf336215def68e2fd131d9a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARIXB2402850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dabb8e8cdc95dba3df39b6486df8af48f97739c7264c36cbdf2ee5debef749a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTAX2322617.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c19a4e183806a6686c30ed8e8fabf603a9d95421b2a6b2aa98c5c8ada0be53. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTAX2322618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69da720ac8cf454aaec8a614c26b53807e4fd37d70f4b4fbdc09c61669f4481a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTAX2322620.