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 0x73a3153747ecc3bcc1f1fc5e3bb806afb6ab26a04ebda582dfd848165a2722f6. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d195302a-9ba4-45a2-975a-627bf646dec2.json and https://artists.proofprofile.net/proofs/artist/d195302a-9ba4-45a2-975a-627bf646dec2.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 0x2227314284641446995d6938577a5ed288187f61c5896a71dd4760796349317e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:50Z), 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/SGW502584785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e57e5c800e100790d8cdc9f725b0b9a392e14abc3fb6bff62d433ef450d4724. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/SGW502527827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46087d042f3ced385e19f8a9f0c856e6c67b5d49774292845a5715c203e191f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:31Z), 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/SGW502576368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73982b8dad2d4283cc897af0b279442659671642a0fac67ecfedb95cd73f4cc2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SGW502533080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f84844d8c57c92dab0464db001a769fcbf0655a4d7601f3e2e84108eb0dce6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SGW502533049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398ba77b1d9c354dcbe0f211eef8ad2b66e49ff7f3d676fcdea5277c6b87189b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:03Z), 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/SGW502550352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e8e9816a989136909ad9870ea4ee4c8bd1f3b37d59b44e9465c314988c0ba. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/SGW502565316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03176e36046004770b882fbe2b745f8662137df840700525c252e7a9148626cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SGW502511302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cadb24755a18b8170def720e8625612285883f7fae834fca793e597dfcb1a7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:50Z), 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/SGW502523484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a41348186830ac8968e73f36e25005dfcc9d4445c5f0b664ff691e703cb7a. 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/SGW502567714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d756502ea5bb02b478791b9ddc4fab88e29395f89afe29d5b8d64890550ed. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/SGW502542663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaef8d99fda8ae83bc8600cd5a07631ffdb0075f957743bd36ed08678cf56839. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:29Z), 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/SGW502545101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b898e8525284d9c12778b1f8887d4bf75409285d9a457065ffc7c3b92ce958a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:35Z), 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/SGW502557918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd373c6d9bdfce5a2317e8da215cfc28e34517169df1355087ca80fef4b5e4e4f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:37Z), 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/SGW502510672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c7e390c64564c93228921c25d591976f491c99113fd5aebca49c32dbb5cf9. 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/SGW502596150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790c59ee4462bff7f7410c4b7357bd773bd1a48e1bf4b7ce751226ac895681eb. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:59:50Z), 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/SGW502598729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01a1925fd99fd375ae8dc91ff5fad5ffa069cbf999d3e5c3ee8c0566c4f9bb6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SGW502555385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d23661802bf81fbcfec20511e2a2762e43ad2ab168decc2f2bfe5c3155084f. 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/SGW502563093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bb84851f7fc34f564e1e63d69368e4387ca03055095406e723cff316fa3521. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/SGW502541773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef21ebfb7d8924a13ae2fe685eb201c9605307f5158b2dc4c7f07bdf9fb02967. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:41Z), 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/SGW502577720.