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 0x245ea70f8f4e57efc12c708fb5795ff5642f789955f7241b148609a627d88774. 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/a2e5761c-4304-4e4c-b568-8b58de3a0a6e.json and https://artists.proofprofile.net/proofs/artist/a2e5761c-4304-4e4c-b568-8b58de3a0a6e.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 0xa21320ea91dfb1205799ce6563de097a725e37586c11a83260414ae68c6cae45. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZVEM2308515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8614bc4e9386bfa0dcb747dd4f94073eb1f72c5f0954f6a1b9d10d576935d63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62404332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2687b4b4cc61a91d38c46ff1d3edd95b09f0620b4bcd4fde9f5fe54da152abd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2089275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0840bb7db75471bfd18ade70e350717bfdbbf2a338a3a20d8730e504c43b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872117390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eb6c9a4e01608f84ce8a6cb909cc3152622637bc1bec68e911b45d3d68f268. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282190404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc72f4dc42870bfafabe65467295d0cd7ad7b2643e2be5cdf16b370e0e58dd61. 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/DEQ022009930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374589297b3befc3b6850dd8f12c122f5cdde139030950e39f4d7f8f2a45a811. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022009932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca5d80d4612622983161ca65cbd40a56c27b133c4d95d5e41070822a9d50118. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022009933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbb0ccb3d64531c67358bc77fb17820cb61a3849c7a118bd1cc738942d26345. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022003284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc916b3e3b9cf15e9ff739ab3d5252a4536595abc3c35d234d6d8f6c96371660. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022009937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e6f07b39bd2639296a877be1291dc69d73bc81bc4b3ddc2df057a4b955963. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022116396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2acb48e4be26bd43135ba979c95753c40a740afc2b9f4c05f417e9a17b0ef1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ022105346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa85d87c6285f3610cabf5592ff76822bda528cd45fee3a957b1267a2ef401eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRS182035278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38449cb84c3a94001234b24b36e078d762bf132ad6e647433105a78f0c5c2b54. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEZC62127237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64cdb854b980dbe4adaf5d0bc705512cff0ee3757a85c98cb762a0cf3b33ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22200503.