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 0x658d530c958ee89b20c1f16d69e263dd24a50dade7359093c7e0b2804aac48ec. 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/f2d95e09-40b9-4ec6-be54-ec3585d55318.json and https://artists.proofprofile.net/proofs/artist/f2d95e09-40b9-4ec6-be54-ec3585d55318.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 0x8dae0247fe3f687250013f815c4296d64f6e86f0db770d126f13035995b5cb36. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBRKQ2176989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4845ef49a960059267628d1996ffc55ffe91472119884880f8ce2be6ea482317. 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/NLD682104140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176870a7446c03200179f8b40915a4d74d6b3109c87e958c76b3005b6c4d7dac. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX38U2264886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2500d2d55a1ae945379b200124368425c5db04c1b64d24fef81b3ff016e4dfa. 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/NLHR22200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ad5ef6e72d531596b2f6ead24dc2828c3d8c9b972a738e429893ae45d7bd41. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/GX89G2374710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bef05ba49bdce64c97f5e2cd0f76e619bfb71a50c122b0d7c061f9e97c24fd3. 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/US83Z2347082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3371f944d2b024637685c38cf332fc0b9ee46af002b1634b255f1a77fe7424. 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/DEPI82324839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef9f157b7925ef51cd9b66b7e059537c4fdda911d5ea74e55c267024680a4b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZPEW2407931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b7299e5e760aa59ae345b6cf483b8339be988303bee6f40100fd04459d8d51. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPEW2430143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10abb4658d9f50e7e3e0d4a32208b077e4af1da19fb64a4fd143b57c5935ff9c. 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/QZPEW2461202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3126260f93bd06493b05e33d804a8a89bd7f95da6e602c25cedfb32a58fd9b. 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/GBKQU2550525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed44c5e877a442b2b1eb21ffc77bfe7640f1223eee21167f846ab6e4714fb56. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU2550527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb7d3dd3292a5ce793fcb81b9b0acec274a5edadf51098a5eb7a547fdfd9a9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US83Z2146132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b370b915c912779a7913d71568f1579e3122e9e08b3330f56cce56956b96541. 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/US83Z2222070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30abf4fcf90710b2eeb0337093c6296c10e33ce0de125d59d85ff1a4039b39c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTRX2371571.
Colorscapes Volume Four - Mixed by PRAANA, Matt Fax and Estiva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bf80f4b5546f03a7c8b5dfbc1b4ca159c5745dd56e2b6c010ee23418830eae. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBKQU2282603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70119a8a93ff5e89ef26745ec604d676752f3ee11edca1dceaac2011ee9225fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QT4K32576375.