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 0x829c11c1ee0d76478252a59536b5ff2cdb3a6be79d2d92a169f9df6424ee7009. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3eff47c-7c66-4a41-96cd-d0991ff1e500.json and https://artists.proofprofile.net/proofs/artist/d3eff47c-7c66-4a41-96cd-d0991ff1e500.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 0xcf046e999d8f876957fbdc0fdeadb336b1bc7c714b9696666596e506429e4ef9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPN2035758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed7658c433e22b8238437dcba7191cf030aaa22f98b9d21a16c5d801117032b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:40Z), 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/TCJPT2280369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44faa9e432969a7ebc4d6a5271dc1ae79c42083fe8f68c0b74ce099ac3fea26. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:32Z), 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/TCJPT2280371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4813f9e73207727c669124e4b7ec90cbee9b77854e9ec6aac953ed440a973818. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:15Z), 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/TCJPT2280373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc67d4bf3811ec5ce4112fbbd14abe73cd349c1fd7058d980018f934f917dda. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCJPA2492801.
いつまでもあなたのままで - 郷愁編
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcfe473ab1a9a6ced8484b39db9df47e535ce7b0ac3ed331e86657a19513e2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:31:36Z), 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/TCJPA2492805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94369a61668fed4ee3109cc88ab70128b3f9bb85186999a87a0095cdc6d9d1ef. 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/TCJPA2492807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3240c64c4026f89d919c9d48b04d31e604cb500917e654c00cb6aeb4edfc5e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:39Z), 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/TCJPA2492808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c05fabd12e0f2bc96dce1156c3c7f04d6ddb6d822e0180c0fd1e86a1328db0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:44:51Z), 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/TCJPA2492810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74070cfcfb837657c9ec73ce07f97528fcfce586e7ec84c1c11cfd99836bcf7a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:24Z), 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/TCJPA2492811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bde0fe01dd754fe95bea70ff169d2306109bbe835b54c958777e62bb7afdb1. 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/TCJPA2492813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f2a47caaa81f7ad3344141aed22bccf329ec5c402b6f395e85b274bdde4153. 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/TCJPA2492817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0711cb51ca71f05fa437d0d4144a131b54e10d25e68d5d2159e65b5903612164. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:01Z), 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/TCJPA2492818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72f5e3de1cc1f0e9a66e6ae1de678643b42c896049833c4aa378d041ec0b697. 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/TCJPA2492820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd0081d94fd9e938c1fb7e54dfc467ddb348539fb12d362f077bfc5c856a035. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:36Z), 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/TCJPA2492821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d7fd3ea20ce0ea7b2f3c5c33af4d5031c0b6af90b2ec94f0c5fa43c02bc4c9. 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/TCJPA2492822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02a1381c0505d4ba3397e62972750ba55109eb7fcdf5c6055e1a3f299844ef3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPA2492823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16777bd97c1a15e1fd3b085e4004bcc39feb8e2dbf47809fb8d9e40c8546a13a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:50Z), 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/TCJPA2492824.