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 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 0x3a9ee37b24a4181ee144cecade9f15dbd5c287847f86856bee290d8bf4073932. 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/ba752ee9-83d0-48e2-93a6-b3f653d63e59.json and https://artists.proofprofile.net/proofs/artist/ba752ee9-83d0-48e2-93a6-b3f653d63e59.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 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 0x395037d96f3df84f60e5fa770fe20195884dea0a449f8c87e55d84eebc6410f9. 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/CH6542048194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56248bf7d41150dd224728a9f7958685a11e3e93426509fe20fb9aae08e93bfa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6542181425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8b541aa06ca70d230712681b2550490d5ee45b8aa1fab07446f038dc647b4d. 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/CH6542181428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcb0b5c3c0caf5138d0bcf4cb9726aa5c04ad4819afa84e91d68dc842c9383c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CH6542050029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef170b4b15c1b5e05d34299261aad4d3c41e8858db588ff47b20cf341427bb9. 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/CH6541926765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef02cbd0948e861718104dea19ad79c6343666269681e32ed692fe3c21b462. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/CH6541998559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e3a673f2667f21b6b52ab05adee96f9b0ce571d0fc2fb3015dd474f2570a0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH6541954184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57eb254d90ee1159b0d58d569baafdeff5b082bc54fca2e9605eaffdcd49fa. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/CH6542032709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a33847e41b0ba526e4491cae517ca68a45fa65816b98a7b3268fd3ec135a927. 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/CH6542130774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ded6d3cdd71a3db46b076c71758f19bc122c535f8a69ea3eb140cbdf9ed68. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542130778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5477b136bd4a38ff6a8e8b3be3b5e84fc82bed70a0bd8587a688a0aefbe30630. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542186493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b9dbcb3d2aeda2dbac5441c7649ba620b2b841b1d5aa8ce359a58d4139989. 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/CH6542232440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ab3a38155d25b29d622e948e9446976d198d35d863698a5c7e28b3fd5094e4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6542235570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7f29d609e2f04ecc4faf25285df72aa7a5c961e136e354fbc19f91bc36c1a. 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/CH6542238854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834ba4abf0ab42ef71a4e49404fa2f79272c55eb1c155dddfeb79da2a1bdff1. 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/CH6542268286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f58e542f5f6c8ad2cb875df3e3d7623f0f366202bcdc8a8f252f612a679b6. 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/CH6542312656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0cd61cebf1582c71516adeed660b0a6f1f1ba144b4821141b67daef2e18da. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH6542312657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e214d290207f6a3589a0ec234cb89ee964facba3f81c2dac376f41e51a2b41. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6542312658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7597261efc6a3e575a3dbdf9da78e46581e9cdad9015c69b2ae8f0f026569e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6542312659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc20e47b5b6eb39b7812070ad5852597c4a84e639485ff21a7b7da7257ca2d4. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/CH6542405317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef35f7bb039a59dad2dbb4bb857a4b59268482b11b290c1198b664b4d36fb51a. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CH6542407888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fff36d7c59b5f3828dfddca573c62c94ba5b30bf35adf5ca86eebb622aad84. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/CH6542407886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad982e91ba4a69b53d9dd81ddde5d6e2dcd0afcc28cb2d87762963b5d445e8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/CH6542407884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030783642daf2bb5cb163f58acc1af033f6422be7675dd6525507b94b052d901. 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/CH6542407885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9a841744f094a20f43ce7be22b93c3c91370605b17a5d9944edca14c53fa99. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6542415039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d527b87985aa009719240558ef4542926cef90300ec2a9aa8159681eead6ffc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542457742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d3157a88e92140bad8ae84dce21b81c4a02c272a679a094d26792c996d3585. 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/CH6542504922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974dba6446477edeb6b18e904df090af9cd72952845acf9e1d963d9a988ac9c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CH6542540808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c0ed20fa0cb3527dbf50ff64c1b8abaed57db96824df5e574c6ed237598c10. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CH6542540807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa204a09ba56977f8a6ccbd7101d6d9405a696f459dccef0eee7903b68c84afc1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH6542540810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ebf112d36e8f2f5921543cd9d30c75753866dfbdebcebb552347a139da145c. 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/CH6542540811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ad559b4f909814add7ad7c500e5108556e89136ba7194a39f0d276d56e1c50. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH6542540812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe42dc6e57d82ae837c8995c23e7c9b01e93a100a5eaae998a108e122994c59. 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/CH6542540814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadf1bd1cfbc26fa085e694ef86b0be84ea5e3e9e22af4c2c6f4ac212c9d73a0. 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/CH6542540815.