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 0x626e1e8a1dc0ad5afe151abf8247d0d1a042519874c4f2f991a09e12191b1a91. 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/8e47695f-bc94-483f-9a3a-c7e1a3dbdb43.json and https://artists.proofprofile.net/proofs/artist/8e47695f-bc94-483f-9a3a-c7e1a3dbdb43.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 0xb7e69ad7ca74f77ff202abe618f4c55b84916a53d834234c955ef93f699a2239. 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/FR9W12139434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d72264bf64762aa5fc4f994513c24f07f85a36dbc9aa1bf1614866af09cf53c. 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/FR9W11931073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892839a43af1cf354c985ce38f5c99ea6853f81e64a4792cfaaa2876e3e5dd4a. 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/FRPH71700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda85daf214e429a944d44ee7c89964e7720a6ed427b5e098373c27a38bbfbfbe. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:48Z), 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/FRPH71700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb14319aa979b612ad0352d851eef7a69c1947e4f639c0da5c23d23bef6186b. 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/FRPH71700190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b53678176e0cf32951cfcdcd6eab22a4c20470bde86e9a9eacdb6d9b733629a. 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/FRPH71700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2c117f3c277fbe95cc1d30af82e0eed4babbe1fac0dd2c6531a5105098bbcd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRUM71700133.
Toi et moi - Bon Voyage Organisation Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17976d96567e01ef54477747ab7e9213e8fea8096f476ebe84a7d7db434fe73e. 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/FRPH71700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e06e8e4ada423a3d7e65f86a1cf0e9efb583b07706c81da36a72c87ceeda2a9. 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/FRPH71600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ca0172cd9156b43baf37c346a928114e577339ab1e79af2224fa2d1b38d30b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11503574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec5916d6905764cd032e7af67c8ab0be9c1c73c61b0de167e237a967db3582. 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/FR6P11602860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa599bad8a6232e0501dbbd5f67452c565056002ace297b190d1f9c31a2c28d4d. 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/FR6P11602740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5e6beba8907c6ded3bece935d750f5f278057eec1041e33c6a04553d612b1d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR6P11602580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51ac6f0986f1e24c5084a3f364088bf3ddebe9167595d45856d2b6f7d6d887b. 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/FRUM71700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d09aceda1acc12bd68f5a188eb4e5822bc26af1b88692bed4805e2de366b27. 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/FR4DW1701460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c5c116a26e8b535862270c6bf119358b977856aa9b1924429cc75bc5db2266. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR6P11602680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36709d26c789f2db75ea100918ea22d5bd3cb8ad4fac77d7f529305353b0b65b. 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/FRS712000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a1a35361c2d4e1f5a8adc6bb392df3fde3f6c0d1ec7e632f80c7ff292394fa. 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/FRS712000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605edcc1cb566dc0852561608e274a871396c82d9119f68ac95f598211db604c. 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/FRS712000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe43aa6542203613a240e4777f8028d23af5f81c4a053320101da263dfa4791. 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/FRS712000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01371dc5f031a4f4fbc62755e30d295554c0e427a3c2aebe597a48c44b5aab23. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRS712000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc1f8ed315f70e23d172b72adf42c2333418f181f6386df105f051f9ab94cd4. 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/FRS712000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356fb093b5640d70f49063ad49e657fafcad141fa48bdb17157a8d1ca06e67b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRS712000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612b6432cd8808966bdef4aa858df3970e1e93a53717ce555061d9f903ebc8b5. 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/FRS712000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a9eee4e4c03d74ec66e8735625f68dac86a398e59e113f819c8b204a8a584. 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/FR3PA1100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7296cd6d1585681c126d04e22496b02c6437ab7107e33da61fd89f972328202d. 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/FR9W11602534.