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 0xa401b77925d7f8bc9774bc5d303f367864c407ab228b880eba6c924535cdd197. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f748d909-dbfc-4edb-9f52-62b496ae84ba.json and https://artists.proofprofile.net/proofs/artist/f748d909-dbfc-4edb-9f52-62b496ae84ba.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 0x8f74f9ee091e7bb6b28636cfb3f127ea3a0c62996478460d735ad48f7e139240. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZDA42573314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca72e90906d7a14faece80b9bc068d22f631de74aacd9481d78ed5ad3f07ef85. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:47:47Z), 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/QZDA42573315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a6132f295110dab5da4f16c15a06ed226d0abeb0d5b43c433ba447a2c43ef7. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZDA42573316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d48195f503379c443e4964b4c0db2254f285c4c4002c7a092a87b813c4a2ce. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZDA42573317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da7476d0473f3708ac34ee9b519181b706471b235485ff1669a255fef82fe54. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZDA42573318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e9ff4bc7ecd325374407b55c07a5774f319b1970e2993e4b5ddcc5090d52f7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA42573319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eba10470a5168d0d5a5268e96c2bd003640022e2a4aa032cfa2bf9d10c31751. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA52542429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b48c14f3b765c7babe0120955944375a62e656ced5e9d7768ac700e791f288. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZDA52542431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440b903943be9c05aa3dbae925fba451eac5b2eeaa1d9197cff9914826c88593. 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/QZDA52542433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef4b432c54ae36335304b7842151470293c8b35930562113067529d0dc76b76. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:00Z), 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/QZDA52542435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e97cd4356c745a46de207c89c635705c04c43c566eea2c635d3d5e90624f07a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:16Z), 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/QZDA52542437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced417d35470e6c96c4bcff707fa52e2e8f8e46d744ef98fc039f5c11ed04c9. 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/QZDA52542439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc432a507afaf393026c24c0631318e89abbf13cf79c5abeda1cd0a69f8d0ee. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZDA52542441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe00cb1d2310d0872e05242b18b661412f36565f85ad3eeef8f90a3bc995057. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA52574450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1dfd6a5edc135da6dc77f8cf2942f2b85501f5621f936ef1b41a34489704fb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZDA52574451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87cd558d93276ac8f72403c226d7d73542964ca0155aedeb305eb1a5a447add. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA52574452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32554f84e49ad1b784f27fbbaa10dac1d126a9970bd889b95492c867872010. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA52574453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c74d2708c592ebc2caf5e22da3802d05c650dd6bbec0b90a95ede077f480a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA52574454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebed1129a4e1310f5d67c642691370780ef2ed6dd74e9e9e78e3a4417b6e1428. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZDA52574455.