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 0xbf9854c17709ba2ae3c852f8da33d430165e29b6951b6e2f57f7da6388bb2981. 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/ecb5eb75-423d-4a7e-b249-892d1885ed7c.json and https://artists.proofprofile.net/proofs/artist/ecb5eb75-423d-4a7e-b249-892d1885ed7c.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 0x4bbc864f4636e377e4c9f901a3118bf21a8d99860a3106172aed4a5f3f7cad24. 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/IT0681601140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ae151410e22175e8caf8a9c3eaa1fded07a922be5a4faaf36a90b648356c78. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/IT0681601141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6b8dfec580b40fc812ddabf3bede1e1018f1735c675ac8755b66de14c47f1a. 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/IT0681601143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74510a4fcf75f6e22fb347e4a908c92d50b321c533a06abd45b1ab8b599302b5. 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/IT0681601145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1aa838a2ac9179c6638fc548e5c8db13f15cbed855cb40df940050958c80f6. 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/IT0681601148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c96a603c0d35d55e902a8f0c141c6dc2ea3ed1a0625a85d536f8eff4efcd61. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:46Z), 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/IT0681601150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb9eb1b4979077d5089f5baf89a14bbcbcf4be5856bed1e2ce20f9c0a12d93. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:53Z), 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/IT0681601231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329cd2dee506b8efacdee54294f38e6fbce941f3b7f3d3d8bc5d4cfcb47e3796. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IT0681601232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445cbe0adfc65508d5707f322e3617be91eb0be4a921ecc2befc1007a7e54f9f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/IT0681601233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208d5d9b41b20bc7419e97d44706209da5d716517b9359a00097dbade13ca555. 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/IT0681601234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b453927971bc16728b501450ac3e1388727599d146bfea76326c458697b866. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/IT0681601241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d239816b65e60f86f0d9a4319eacd13f1c240977c8c697171e94e6a2d668926. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/IT0681601242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a5916670f3cb40868ee8b3e2dd8850e94903c9ed3d894fbfcfd84a16a8e45. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:30Z), 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/IT0681600813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193fba9cf6d91d9c6301359e22772e163f07a71063ee610481e6e0dc77d20b85. 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/IT0681600816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc5ecdd03682d332dbd47d4455733999a31712af3d14b566e22d14cfb2e330a. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:47:33Z), 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/IT0681600818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc11b5e5de4dc5d72a5d6cd432c435a6eac9304601b044c96aeb9e18bb82cb6a. 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/IT0681600822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2972d1c0cf6a69a80263268c51f0888dd431eaf75219f1b3af409045db2de67. 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/IT0681600824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba8e70775c6e6c70879085016b1f30bf54b980ff1c114641d87bf7410a2054. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IT0681600825.