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 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 0xda2fd79c52674c73c410187441d5ee148569415133e0470dd9b8290e035a245b. 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/a93b03ae-baae-4dc6-b79f-5c3b43e9274d.json and https://artists.proofprofile.net/proofs/artist/a93b03ae-baae-4dc6-b79f-5c3b43e9274d.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 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 0xbd268dc98125ad1fb2c5ac8d8688209566544d8b45ce01b55d01b09825d4af8a. 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/QZTAS2213958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd091945012045e64bf767f83b7eddbbc029386a8626d24ae03051e6bcba751. 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/QZTAU2252551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7da53714dced95efc2eeee6e0384052113a6aa270d5fe215063bd4f15fef5. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZTB42254766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78393d6cc604fa264de6191757c54121e83cda6c5abe96d1264428fefb0f96b4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTB52212793.
Illusion of time (Nature Sounds Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4bf5d07c9eae354335d00ba8f904e40d2c244beff895134394debd4fab5139. 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/QZTB92287111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5088b59191be110f968f1f00be691a7b4b95254ca0f0e63a12cd392fa1dac4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42375088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089c6391523802aaf48ca1a2814e79d3c31d4ccb6149cae0c5fab939118abd86. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZDA52308216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67451da69bd40346c36502afc5f8c37d18ccd4831ad56ad538093811a5fb3e68. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZDA52308218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08620f8fb1bd1cf2bed6f32639b849d253cdc366f7fbef239041b31e54be766a. 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/QZES72357259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef123616454e502dc7c52871293e6b5744a1224771767af080dda98a582d285. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZHN32388330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c67c96d94bac96b65acb199d50074349f4fa2c341b40f32f1d08019208122d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHN32388331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1898e2ad0a98dc3e510d178585819bf3a4dfceb4a2024d06d5c401c7a1aa026. 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/QZHNA2329762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b2b4fcac266f251a3f8028e7f630b1a5b8ac411855bc80fa63c19be598c43. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6H2366814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d8521270d95bf4a2269b5b6b63e889718246fd3a1bdb42b888fe2bf41cfcff. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2373867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88bb879dc8e426f25c8f97db315458e4749f56dd87fea4891b60b989cafce70. 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/QZNWY2348085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb000ad78e18f33e601606cb7e27c3f799b607db59fd1ce798ffd10e293e9f12. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZNWY2348086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad9b7f05eed0d318904fbc529ff3604698dd9a0dec9e4c3786d2755e241ba3c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN62375101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0648426b390daa4d4c16b80bcf7394d746f3f6018bdababf461248e9e885e8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWV2373865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874ecebca963b0f572a89969861155bd4574d480e47cbfe6f9efd0550e378b2e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72535327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e996555d0a6dc2f2d0e26f4d9ef4ce8fa599857217f04c5757e1a78a280932a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2538545.