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 0x4b04651495d6f337bd1516d6afafbdc0d625d3235b40efe1754b751da77c5d95. 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/66cc2a63-f131-423f-b068-b57357f17fef.json and https://artists.proofprofile.net/proofs/artist/66cc2a63-f131-423f-b068-b57357f17fef.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 0x1756c53c9f912c5c35017b79069929a9f7505a4ef1f7e8999482ba6c3d5674c0. 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/QMFMG1358777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37fd92c9a8725f607e557b6d74dd715f8be6eb74ca04d142097906bb03ebfdd. 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/QMFMG1358778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23b4e228b156b6e2ba97058ed7c9add7cda5320a98822c11e6a0d658766a1b4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QMFMG1358782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cccaa9914c1b8b63e26f67fe81d5ef0f0d9490874593729a4f88b27717d5410. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QMFMG1358785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1608428e024492bc77663bfda3e2d344d8c2d8361442a833e65d8e0ac72bbbce. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM6N21415037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bc2510336a86ae300fb03ecc22ee5e3c11105f578d85a8f05cef2185521b3d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6N21415040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435a69bc78860a5cacabaebdc9767e821cdd151c606e65d70704781adfb02373. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N21415042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e06e422c444ae61be35a85d0d37ed05ac498c734b9866b06366a06532aacc3. 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/QM6N21415043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806043c7f4d75be4ac7ab38e3b904bfda33dd594bec1856f72fa21156f3b4e1d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N21415044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae78b75dc8fe4893a3680a28f8e6218f05ff47e0951719c07454cf1920378eae. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:52Z), 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/QM6N21415049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565fce7909eab75b48c9e6e5d66ea952d16a75128e40009cae925f14b0f8258c. 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/QM4TX1717184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e782a247cb0b348d44f0df503c4b0c6d257f1971c99e4296a52c2199eece78. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM4TW1752366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d6f4eea455d8a16d27d87d3d6fe553146369192165ef5afc18dbc83172ec19. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX1715043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7854769bcc7f506b37432691125206af311ddbc7122205d59ec70b9f2c5f8. 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/QMFMG1528659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc212643f30c15172f60fe1e93c2c90339c30718cd2381f9be360c08ed661d90e. 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/AUUM71801242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774b60441670a912cf171ee9b78ab60bb748cdb37853732932d5c346fb3564bc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUUM71801244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bc002827b8250b17ef9ef036c6c200ef23ca800f3dc11aff01be079b6e5e9f. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/USFW41911502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd875327f4c4090b5a45d16e50528d3a90da5614e12529008efe7c9efc8dd135d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USFW41911503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac67008fd2ed0d742ba994beb241488f5c6201375c2cfb90852f4a0011ee2ee. 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/USFW41911504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfda4a9e661b15d028dbc6a65aef72b71a659a0a557587632853cd31ea1dbf8. 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/USFW41911505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154ab4942258cdc67fb8f883675b7b2b622a2da0b0a81b4c7a1d3fb8d158d70b. 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/USFW41911506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a975dd004b376cb02a698da6e3a1a7f6d192998e70648ac6d88bc26977f243. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USFW41911508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9319c1d48f54ca46376402606be110b4e161152d4dc7283888444461826bef. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USFW41911509.
A WIDOW'S SON (feat. Anonymous Host of Casefile and Feine Sahne Fischfilet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c20dca468ff2bad418d64e93c92884e32d7913d93e50839ca6aed681c9bcd49. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/AUVWE2301131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c65852a8eb4ded2fcc20094f13806605db3734c41f26f3051d4ebaa0c83e65. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/AUVWE2301147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c027aa83cb7fce38372dbc3f88b1960d094026676ac3108eccc04f91446d19. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/AUVWE2301148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f08f29ef067a9d2ee542bbd6589a60cbd0c3fb7aa20705484f8e92502db3be. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USFW42316401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda17e81a8da9ee3d86b3a414dab9c3628ed17dce689df11aaa95cbfe252a9d0. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/USFW42316404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230adbfdca38f80d4e8eab238f7e127659e06839e6d79ef644d123be50fb1602. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USFW42316405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ca70850e211475f284ab598e612fbb75c27c372af192c7dfa78a2fff435d0e. 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/USFW42316407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dbb9cc0dbc0d0caafcd0a882cd6fe6a1a4616e3f23e446d30e3e58da2b72bd. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:28Z), 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/USFW42316408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629ec6905a912878c6c2306a2bd01e321e36557a19a25a76b74708c10d84f54. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:17Z), 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/USFW42316409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c82e73389a4ec6da531e87dcd8fc849a37918b286fa43439bf2da569e93803f. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USFW42316410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fe6b87ce080e07a1fb99d997b7f43ca255abe5412980508e9a000ec510ad38. 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/USFW42316411.