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 0xbd3e6e44e054418482de4026de532f3c1754082758bb12175ca09cb2826e4233. 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/f231d6fa-4ce8-4628-9d17-947348f00143.json and https://artists.proofprofile.net/proofs/artist/f231d6fa-4ce8-4628-9d17-947348f00143.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 0x6c18bbfd9fd9e009da42328aa1be78db098eb9c0489d270056bf473bbc3fa5a2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES98I1401942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e355a09fc4dec9b0bf61a3036c0ea0d552a8a9ff51d16188a327b378895c4dd. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ITA061300998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0052c12aeb52f5e39d5a89d8dad86ad48f418834e1be6c770121249461fb047. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES84B1510194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393f1564ffe16086a4c2be46e07c60a352a128782a11c8871a09b7c5c7e7fef. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ES98I1600223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa5020fc53cc48e628c03199d3cf7588722c9bdfc4676b0e5e7c4c07cbf4bb6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES98I1600793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042d9fce27b9254bb7b7ec3b8fe786bab8d9bc6c3f7ad20d34408e1a46bc3126. 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/GBJAJ1701530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9d88d9bd10c83a8657d7fd0dd2d9885ad55f0dfc9afc1760d8a4f1a6730358. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ES98I1800729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3fa3d8e9915d4a05a0f78d9f497fb4e00caad689450ab4d038d51d0d09972c. 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/FR96X1944281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8b374a4b82ec0d4d03e80340554b63608b326f7630725458b6a739d90b95e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES98I1901782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0291e4080b0f72f481b5cad3439ed1b080fef7a5b0a3735d11690bf84b829d55. 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/ES98I1901927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1572bda0f376108ae3f78c9c4053c53106e866d11214f2615ae28f7bc0c0f84. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES98I2000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd0fd90d93d497f19796ef56ba64f3469866a51d4c84670df1c0fd5c657a33. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBHAD2002379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c07e21ec0182a5240a179017c950089d82707fd321a718a6d5835c6f6c440cf. 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/FRX202045068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45197784497dde7f8aef95a09ed15f93d8de5b97c7bece3546c9987e8971433c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR2X42111756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45197784497dde7f8aef95a09ed15f93d8de5b97c7bece3546c9987e8971433c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X42111756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66e6f079533322eb1e5524d0ad75f02986c5fcddf1a921b68644a5be310c34a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEW872104253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694e9cc72f450778f1a70f5fa8357ab7694d5981ab86b139a8cf1ac518eca83b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/NLZ542100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc6e82ba466dde8a2563c03a13ece5f9709a2571764a52cbefe211ba7ff592a. 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/ZZOPM2106322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea1b5d3063673661b06d70d32838a18f26f05b7120fbe7679e654e4bc0fe97d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:16:28Z), 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/UKU932118910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9046015a6f70c7b025e20811b524fd9aa8fc4225daf636aa45c7eda6df051a33. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBJAJ2101975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7136f3e6387a4b63954d7dacd5a6c5d69545df1d96c701babaaf989eb8cda721. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBJAJ2102234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7088319249a81ab845625444943d18a3cbcb5bfba020df35dd2d692d1a951f3. 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/US39N2201428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd1af665038eff5c118343bafa4611d46767be834816e6103c02db5a5bf4768. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/UKR6V2340430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec82d55862cad2a683926bdaea78a876bb5d1b201ac88c19b1e5c21b97e74f77. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:30:57Z), 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/DGA0L2384244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ddd70208824c2f014ac46eca5521a00961f59e9222c54962897f2503545c42. 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/UKACT2400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c70f0ce8f8273e878a53f3172ab6c7a5d81a73d0c55e2022228b9f3642ac54. 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/UKR6V2410458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c80c8d914694225bf60a728384dcb59d997fdec13687d6a9928dfea8b43190a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBSCL2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e38297372b6290413ad6a0467c82c3d51e4a2faf91e87f86046aaefbc32a5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2P2450512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e157ab3ca4e09d5eb4cbcb89a351c627b94f95673cbaf955e961832a906e335. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES84B1510289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0088b43afe78ffb8094e7f22804c2ca41efefc86a2ec37defa121d1111ca1ac. 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/ES94G1813106.
Toolroom Radio EP362 - Presented by Mark Knight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bebfd1414f80ca792308712cd8f255cc7834dfcb431ed06c3364729c996ec. 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/GBJAJ1700233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2bb8f5cd0054b53fe984044060f4d7c95b619310a96b8593c13398ef489bbc. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES84B1510286.
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 0x88608f85df1ad36cd897d68c3bad421c11d8b9098e3d2e7a993b192f514da0cd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES84B1510287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06d6f30346457613d0788c3f4a8f2baaf01eb1b24dab20891f8b658bd804cca. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ES84B1510288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9bdc4a39ad4a436d1fb03aab11717675780e12cdb1413f449f2c589e7e9d5c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU2362839.