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 0xbc9b20f376681f6df11ae819228ba0148f45ca9eb1116bd8917cddebede2815d. 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/38c7875c-4c3e-426f-9a94-7e8f03c653a5.json and https://artists.proofprofile.net/proofs/artist/38c7875c-4c3e-426f-9a94-7e8f03c653a5.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 0xd9b8398e88b91a93ba0ea921e649722b4d34e399348c61996a168af66a649cd9. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BRRGE9000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8435255791eaad02e23895e2c6eed386d63843b4474838cb3c41b2a472bcddae. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/BRRGE9000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975495b12962c3c9e092e72d4ae38cca5c6f280d7c086c84011f2c5feebdf57b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/BRRGE9000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d57a7aa717c8261bf3cc7c59e09bbc42abe9696baa3eec4a8323a9362bc4a97. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BRRGE9000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6e8c83947ea7567a050333c4757df8bf9ca56d20006a3a3092e54d469d114b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BRRGE9000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9601db9f099fe8c03fc93471dff8a89c7496b05b8ea7319562ab7c637e64dc4d. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BRRGE9000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc8166fd28e3b1aee3c2ae9520e507949ec0f074a9fe5bdb52a54a602ae44fc. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/BRRGE9000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ed0bf551e7a5ab03921c57acb8bff6fb16bb99331e78213cc397a946dcee73. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRRGE9000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c2b84e0cb5ed11ac39d60eac378f887ea2a4acc7629aa42d93a56ce50adfa. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRRGE9000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6b71dd76bf03f3f67ad3f9486a81bf10123812a81b9e8be1b003b2259389f1. 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/BRRGE9000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66fb35adeb66227a4c52295bc98511b9fe71f3e9aa47bf544856ca1d7fd7c0f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRRGE9000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1ccda0072a1539365eb9ec54b249211e9a581da9b6ee151e42ad017b33e9f2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRRGE9000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74854bd176154a8f0b1ad8d85b842916d64bb915f3528fa846a6a322d7fbbd5c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRRGE9000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70038c9650ba66383b4615ae9816fe78eec7f577fb54a290133adc30b614d62f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BRRGE9000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03db39df0c156ecc9a1e569eb55ef77163bed249a529a477f36859025c0f8b87. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BRRGE9000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b696e4cad053fb39b001c9fbb8f3792de76d5041bf6bc149295328907e48cf. 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/BRRGE9000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599294a5c9862d32aa2febebfd9a984fce1284d97f10dca0a32c00b1afd00564. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRRGE9000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a6a7eecec1d521e28bb5dff3d7c18673b832b3f17171443d8c97589060cc4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BRRGE9000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65b7a3ba2f5d8209fdafcbbd3cdb4f7d57ca40f7353ea62f86633ed2264f2ba. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/BRRGE9000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b7ccc8308d3a98e35212bb0fbfca9c23a87740fec5f63e30dd9eb8d466a065. 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/BRRGE9000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd779d04c9e27e639d864888ce921d3602289a1d18e83f4d679a787c1f851c2c1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BRRGE9000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae43a633ffea55cc582fceb3c94c358a464c26793f61c690072a1e3c0ddaf4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRRGE9000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a97f701dda02b6e4276573173feb9b6ecdd9857f77b1bb9dd733aef60d238d. 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/BRRGE9000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598e8673a82cd14fea13f68cd2dba32c49610a6211aed9507f4f2fbc54242783. 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/BRRGE9000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a830b3904e6d4325cc4570f65e6cb7524bdc752ecd26d19cfff67d3c8302de. 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/BRRGE9000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f86a88618cf755e871b086ed1bc72932e169d214c610a5238fc4c3c974fb09. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BRRGE9000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99a1ad467c4094e049ce8625c829ce56cfac19b4d1eb776422f91fd37698ba. 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/BRRGE9000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e7c9501a1416afdcf9d6c2f70b6d104308b0da95b763245eedd64cdecfcb36. 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/BRRGE0000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd324a4ee224ca96f49da6899dd160e2e380b6c8c68bec789e7fe5a3ccd57f49e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BRRGE0000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bbbceb8155b47f3f1461958381dcedf80df025faaa461709c13be23b6f5cbc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRRGE9300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b3cea71f851c1a8c0c328740cb6732bda26dfb455312df33bd5cd9795670b7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BRRGE9501071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd564d102438b0e1fd8d47e0024e9fb059096f9e61d1ca1b38cf445df3b33f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRRGE9501074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ad475126503e2698445c0ec56918fd72bec7a9a8bb5f693ba0cd6d74d5de8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRPGD9600237.
Pure Brazil II - Samba Social Club (The Ladies Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb78e7f1ec837fcdef3c8a02c7145481315571422e014a53e1834acdb2838b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSGL9300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ad475126503e2698445c0ec56918fd72bec7a9a8bb5f693ba0cd6d74d5de8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRPGD9600237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26676ab2e528f096c9ecb2ce1b044686ae0e86551f5c4809fc88c61545f962. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRESM9800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26676ab2e528f096c9ecb2ce1b044686ae0e86551f5c4809fc88c61545f962. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRESM9800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb78e7f1ec837fcdef3c8a02c7145481315571422e014a53e1834acdb2838b4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BRSGL9300127.