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 0xe4fd5f4ca9d849c66738e1d4d3c95b01f90b998226a1ec4426f0eb610651e797. 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/48213cdd-d1ee-4bb8-8927-50fc3040284f.json and https://artists.proofprofile.net/proofs/artist/48213cdd-d1ee-4bb8-8927-50fc3040284f.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 0xb8cdd2467152a2877c6b392843e5387bffa674aa55dd8bf6077b825fe90b9ff8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:46Z), 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/USDY42420484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5fce041fa0ba495e763266e9b12eaae3fbc92fa747641b87dcdefbf4aeb44. 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/USCGH2391498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6016d3c39e64ee144e9fd68a701cf2e1662080b07867062407d3e49c57fba462. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USCGH2391499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46bfdaf380733ee58480d1c662cac30c3276e5688287d18f8b45286b562ef3a. 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/USGY22250901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeee9b7aa86326453308490424e0fca6fdf90f5c482244079b9c2e8bbfc4d3f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USGY22150402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abde1a232013cddec18f5e36cd99d650d1c6aa533ebf13624db236a01302ddd. 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/USGY22150401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a4c9cb2aed6e1caf0161c0484b93ba6b1ec732fcd8cf1190dec4c13c283cbd. 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/USGY22051001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6613040f6dd1bc777ad7465fbd073a9457081ac021118ca1fcb5b3ad917d79b. 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/USGY22050201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c466a3c6042bc6eb8a8a07e28b0065fef4a8e6070b760c2a61d5277689dbf49. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USGY22050202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e038ea874956f4567a333a438882d6c089e7534ab20ae4d63ca875d6e4955aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USGY22050203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82185e5a08ee157cd0d70a8bc5ebee8614d3a0e185199740d0d20aed0a943a25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USGY22050204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f09d27a402e879e5736c102a33460ed7ed47690fd19dc00ec7c328a1c49098. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USGY22050205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331683cb19b04bdabb7014b70cb7d1a92483b044dbdb92e0ebb256e5a15852b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USGY22050206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75413a7286815975c190ea1dac383b60b341bf0b53bca253b4a486da09a91aef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAED1915409.