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 0xe7a450cc45411b055426fbe4b8f95bf817970606e44bfdb27d5fb45cd715f2a6. 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/ebf5bd78-e51a-4939-918a-892613860b81.json and https://artists.proofprofile.net/proofs/artist/ebf5bd78-e51a-4939-918a-892613860b81.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 0x949b19cfb779707391de41735d13967eb1e33feda86cd296f4e7321a2441acbc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USX9P1142692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a03818cbb780d1c1c232eb49d98533f309728707ebf9ed844a4bd8540e22e. 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/USX9P1142693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eebe613cad7141c37bf3d285e7d3aa62c620907c91fdaa62ba5bbb061cc303. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USX9P1142695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de5df904bfe67aea57f4c705fbb9b54d16f791d711c01cc85425039da513336. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USX9P1142697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d04887f026290de3ca43442a948a48987125d698afad21d53d01a0c81b0c621. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USX9P1142698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688722db5817841d1c41a47721636da04eae08ede64304b947b700b33bda70cb. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USX9P1142699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2d18ef4bdc51be1cbd37818ad8388323b8a76340dc42d4fd100c7cc6275704. 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/USX9P1142679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b28b0e24cc1cebeffe9053982c00d61fc9c1143522ab2c6bcbb317f842939c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USX9P1142682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc307168935a5304c32571c97a0245735d0b0c70877874c2e34782d624bc0b8bb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USX9P1142687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e312a10df4767358733143c096a4c7a208af06328bd7e6cdeb2aa69d06cbd33. 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/USX9P1142690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe027734e0126493f8c0161c2ea964eee063d7f03e2feff3f38aad243fa0c64ee. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USCGH1031610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711cfc599190e20063d98ce10a0a5950e0c8cc85a3503b6d8a746530dcf98f9a. 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/USCGH1082766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7023c3f3aa2367c5df4762639e504090f3b1df2df7ff490ef5482c43472c9520. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GBHFP0904887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36712e59198ca42f440013ee4d144c02bbbf30bb3a1bb0bb66a3da3b016ede9. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBHFP0904891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142b7c4c97c70aecc0ed4141d10cfe97458abc120bff62efd4555932bc485cde. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHFP0905879.
25 Of The Best Irish Pub Songs - Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd770bdcbf1469c722b1ea1d205076ca3a5c57d737bac1a715ecedb06ffbd3fa3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBHFP0402272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eb66d222cc386b49f95eef787673bb729af0786cb9e413501baac9061ee98d. 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/GBHFP0404862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1510c79ee3f7db1b7e0ebfb22366f28d918cd42d4cfc4c4f9cff9fc1246b8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBHFP0600044.