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 0x665a88676e578a8a0bfa77c55e313a86e095280168c880750aa6dfc25c0cbab5. 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/df9e20f8-27c3-4bd1-ae8d-0b01749e201f.json and https://artists.proofprofile.net/proofs/artist/df9e20f8-27c3-4bd1-ae8d-0b01749e201f.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 0xf8957673e38cb632b81a2db346313e24ef806c427fdcae85ff2a763a9daeba34. 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/CA5KR1530620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ae758a629eecd9f8e116a1bdbd0bdbad3d99a5fe085205ebc63b2f49be93f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR1530623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948063da294f48a63b0f730ba459fceda336bdb98177398d92561717b88f50c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:18:25Z), 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/QZ5FN1975782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb280b993e446147b927b14b6f28cd08e8a07a342c1d10f2bafcf845ce11312. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5FN1975784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b50080503860079164de7262de4bfeed62e6e08b5dca75f9cd795efd09c53d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ5FN1975791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95ea27c8b1b7b3d30b4dcc6846363935eb0df858ec983d939440867755edafb. 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/QZ5FN1975793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176c9aec0556363b96ebb38362c63d773678a8839624e252808b9b9bb39f5ea1. 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/QZK6Q1958828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3b62361411dbcad9c0b762dc94a34417d1c93e714ad3b1a541e8d5e9fc299. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:24:00Z), 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/QZK6Q1958834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf0795164f5df7eab3890e79bb58cbf4aec9b9861cb827900ca22be668181ed. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWV2012313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa8b6acbb325ba765ddc34c0a2531ddcf4bcf9ef64ee7b39e112f66ae069173. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZNWV2012315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b86f4f9b1212f0b24fb00873ce10eae7b8ed5dafeb90e8b20afa22f96c0325. 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/QZNWV2012318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c83844c723a963786db320b802061ce21b32fbae3f8defaa8ff5c4cdb7776a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:18:40Z), 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/QZNWV2012319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9d3e7efb338b04b9b2f502f8bfad19bb7387c06eb736909fc925d4f7ee7948. 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/QZK6P2236073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49a82a5261a0fd2faccc1616c770aa4874e588708242063af7a61f81ebe538. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P1827196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63612b0aadd681a799e9979974b7515b16067d80005d369f3bb7d2111ddf40. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZADU2011709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957abeb8e6702b8cc1086ff0392f618c2395d6e4c2733f2471e6e1b7262f2e0a. 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/CA5KR2084487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8018324fccdd9c0752f482d8ddad82851eb20f861785b51e328bc365ffb48df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRP4A1767017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3fd691de54300dde886d58dfcebfd27cfe4254ad83b0f0850caec70f486e26. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/USA2P2209556.
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 0x03fe025196b24196e259c9c552fe91c287b87e7f4a18bfe11e4a6d582bebedf6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMP7Q1300076.