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 0xe3bb46332588e9bef2584597eb9745fc3845f8c94dcde69b5f0b4a1d9b6e00b5. 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/dcf90237-e251-4688-9ff0-46ed387e8371.json and https://artists.proofprofile.net/proofs/artist/dcf90237-e251-4688-9ff0-46ed387e8371.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 0x34379bb7db6902fe08c9766efe132912c2ded502d865dd7ea8f03dbd0e35dbc2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:01:29Z), 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/QZW9L2296028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03af86b7a695979d5e9d99496897d12653c56265a713ca39ab5c88a7f441ba. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BRTS22200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd072d191f335707ec2b192f09c4737db68b6a8df63713fdd239558133c6f6f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZW9K2315964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5939e5d241cac1f618cd5ece6bd91adfea10dce43928e557d9eeafa25aedf62b. 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/BC96K2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a5cb900fb3c0e857bc3a3f237a4391598047e091d96ef1cdfa0fe3dd3ed802. 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/BC96K2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e304cdf64bfd3c811618e65cb32cc891d538b91b3564d1ff894a1766ca72f. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/BC96K2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c2a7b023d90d288929720f30bcfcc6472692aa65ddb1779d5523c03477dc7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:18:18Z), 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/BC96K2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaac7a2f585bf92b74e023c17a5ab670f003a66d16f66d74049d95a6a93c89e3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:11:10Z), 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/BC96K2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545e59a32a5b6f86639ea8563eaa25b41042c791a81c281ab9ffe8382976ad1f. 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/BC96K2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd32a17416f945a800ad2cb38ef1623b14ccb5c1c1ec5b31ada7c71cc6a6459. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BC96K2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b518f1e3342fd2aea47ea55da79592d8b6e793aabc1e4facaddeafd7be4eaf3. 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/BC96K2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74ee9ec1084eadd49252b265a4107941f09665e94a6b881988a0e2d83c5fd5d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BC96K2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5da1bbcebf19a43ea2a3fa502e8c8557ee569b90d68f382d3214023e51c325. 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/BC96K2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa982ab4b055d2c7befc5a09ed8538d128e6020843857cc77c202b0a63f30ef01. 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/BC96K2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867fb6a4778e082c3d9e00da5473b07897f70eee5db767556375c130c6ea9d96. 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/BC96K2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628efdcef92d597b19ee1918fb23bd56508bfac438881a54d44938da53c34b0d. 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/BKZZW2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45696c6dd64a91c68957f6970a3290e849854141e104546ac2b489d7c5fdcce3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES25F2301087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac058b6820f95f8c0f3ac5b2cca7d0d2c2fddc587a7da0e0caca2d4e5113e1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ESA112560706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d4c4ecbd8a9100fe2424ffe2133928e1decdd54b245206d369dc4ee02f62a7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTPX2388497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4a77515e568f2a9c295e60001ca981ef6c737192ba580ccbcc49c976616bd4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZW9L2418443.
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