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 0x46be145139b93aab98aea40711847eefd1574fb95847be5d13bb9c4ab41ebcd1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c5bb77a-a19c-4e0f-b602-b398e8b09ad3.json and https://artists.proofprofile.net/proofs/artist/2c5bb77a-a19c-4e0f-b602-b398e8b09ad3.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 0x1fa006f9d302db6a20c1bc174534e4f2acacc3573578903c137a43fd598a96a3. 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/TCACP1668820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763a14e47edc03f7919e49c4816bedd88c979c3b7ff34b5b7d7fd0d7111d45ac. 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/TCACP1668867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d388bbc870a9f458e80df3f8948c0ef64998110fd30f377c6d45abe62f45fd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACP1668941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993175498ca8f63d6e5dca50f831aa0404c6af898b91ff33f5413244812de67c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCADD1721697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9a88882a867e98eddb64aa61f9e9c820601cbcc0188ac0a4cb77dbd8ce823d. 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/TCADD1722523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45916f48209f2578280b06d7311990f05c85f13359754fe98054f47239105e75. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:30:45Z), 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/TCADU1898475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b779282398f4fdfd3733f31fc91783d3a8f339258463d8215450c9cf77fe617. 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/TCAEE1964697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d64f5ebddcfddbb4259ccf9e5d5482bafa9a658e99698a5468313d580587ce. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAED1975335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd13485cef866560000622a70e35b93db1fb37580e1e1267ffe9c3104b9e4a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAEE1964751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aea6ee7f38874d4c9a3bc06aab08f15f678b5f0bdabded45bb80511b32b0792. 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/TCAEE1964857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d98c9d6f80e8f63b397035751b6a0bbbcf1f1fb1101f739d19edd95641903. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCAEE1963878.
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 0x5bc89317472c62f9cab5d5acb2528f545f3d3c7128dd7864f73d56803d80a6e4. 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/TCAEE1963883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a12ad9a5b3afc91f07c107f5099f30d11e615f04e61b42be5ee8df7fa8c23. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAEB1987006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e89c776d59e2571a5c64d814eb51f5ac0834196bf217507db6bd6124fce9e11. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCADU1898389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45756b78c57fb778170141faa6b2db9a5b1aad74dacae199b76223185ceb97cb. 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/TCAEE1964823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c8af47259d1e7ae844bc5f4349f9315911e05af93f3eb9a35f1c32f5853d2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAEC1998102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc018c70fb8e24a14d61338faefd4611897f840e0a1ef40d4350a2e6965e6ae8e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAEE1964864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bbbecf26ed90b49f6b774b23cf5936b89b6551e98aa4f1f8a7faaa4222dc55. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:44:58Z), 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/TCAHY2435551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ca1f7fb04ec3150377b4f9892bbbda73df172f3c8cf6a8edcc40accb275cc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIT2407562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97607fd5a17032497449f1b3963102b06304b3806023027f215a231e54dee69c. 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/TCAJA2409974.