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 0xb85a120e96be9ff16318611854d5a0348e0f83ba75ff1d37c128df70504cebbc. 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/578aa575-2b99-4629-aaf7-ba1891e76aa9.json and https://artists.proofprofile.net/proofs/artist/578aa575-2b99-4629-aaf7-ba1891e76aa9.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 0xbcd98457cb6634f473cc046ecd29beb25111eceb68c5f7a39f7cf312c28b3716. 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/QZS632145027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7902d2cfab41946403f43de71540c80013b3e01718edbfff620a66ba8aed3820. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS672117866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb37e0d18dc1b935dd34d6412a9d9d6b0953a6f426fda551d64326feac3010fa. 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/DEZC62196936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a5ca72199d44ccea44523044a392cc2940617db6ade90f779fa9403d09ea8. 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/DEZC62032077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905e5bdb44a0444d49ea7599fef17972ed1abb3895093868cccd9eae4dca89c4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZC62004807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc082c1b965c271c98a71d5656f66866f49297fc742ec0a06900651450adc2745. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DELJ82062987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5890aae3181b366db50b55edeb26eec7af6d5e74fc3ecc8205868ea051d2c0d. 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/DEZC62004806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f53385d1f843caec5669223f11f1d65b192b60b2b9ed0e584e96206f63ab9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEZC62004805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ceb79a9a87fb89902292744598b69552a6c057bfe1c699fa93cc246e6f768b. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/DEZC62004804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f7983d0bf569b1b721b42e792d96c35b3e44801801006d5d2e3fc7a62bf66. 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/DEZC62004803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2ff939536fb3b278e615021d7b99edf1471c351571be1c9c3117e64cc6ac18. 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/DELJ82042127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ad4ecc9eaaa3ef644a728425faa3e1b0c41c7e4c40c7aaf92d24796a0b78f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DELJ82037697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf026c4f5e81ba15a8e3101455aec3a8043ab605427690f5cece76e951e95558b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DELJ82014473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e97fa33f91da4a9487be0b6d5fa7b582e54379dc2ab981bb0d8d9e64e0b22. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZS672159346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3461ad7163ac8f42721715a3f0a53b12a6629c9949c3b0e156146392c925e9c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM42K2202554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e765b8df6c26c4980c6a7d13241b9c490aff4b4d14736860509c9b24d530cad. 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/QZKDK2269338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c733556cca7b01d9e724255cc2ebcd9802c0ac3f1c0d5687039c686045db28. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QM42K2259786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fc047840051ba8c0a68bddce957e9c8fe49598837a0775740f43b0446df8b6. 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/QZKDK2220137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537352240721cd52caf95d06f57ddd3ada9f52b1a6f0b9b06d460290785793f9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZKDK2296578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e17c1e722863bec6b1d9bb7f124d350c8ed259fd535f827a7a3c940772ccd5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS652246910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb512b093f1eaa9026d9aa64a6745b2a331ff870804ecefb9b9b96ea6fb297a91. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZS662271352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6271062f7e2c3cff993c7285633769ef210688c1526d21e1179e755ae5485761. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZMHP2362737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f78399b70cd3f41274bb131fb277783afd1bab3199980d8e7701bad3d5a3f6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QM42K2361634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceb44e2912c445c94a40ec6a3e255988826ddf8e721b62f63e9f3c8d01470a2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMHM2280740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956c2999c1e3164952c19b96398bbb9a22ecd3bfa4223e98d73344964c66a49f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CH7812414914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956c2999c1e3164952c19b96398bbb9a22ecd3bfa4223e98d73344964c66a49f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH7812414914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fff57059c4a364b766ccf8cbf737eb58beffd2d92143bd65416fec5aff410. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH7812415744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97c9d4ff5478f334f8c47c57b44f1aa8b1338b1fe2a39bf566bbac8447f6a0a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/CH7812417976.