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 0x60ccb46a64ef52907eadaad9b86d4b9e3b5f29c6dbddc0c7eeb016c11546a281. 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/8e7bfed8-8372-46c5-87d8-23f72252792f.json and https://artists.proofprofile.net/proofs/artist/8e7bfed8-8372-46c5-87d8-23f72252792f.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 0xae10e0a2d4fa737362d3f7a3013b1e7e736c0e2b7ef7dfb42e401d35b756d25f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRPIN1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f1397191e706034e4cea68c0c9f0548849eb0fe981bcedaccb8512851d03e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRPIN1600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d83bb30e494ba47b2fc7cc975daf4ee8f37f73607d80c79052124a6c79fd8c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRPIN1600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5659ae0889a717439142e6dfd67d2649c812f54fcc4276e054d6671eecb7686e. 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/FRPIN1700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a52a2fa7b22fccf4c8757a1d7c7e4d6ad18e0b19045970e6c36eda5293c44b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRPIN1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d80ca74ec04563e573ec369f9317ba098bb582348a3edacd043eae688a7055c. 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/FRPIN1800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912cc628f10fcd2e6792c4b622acdc66c3f97a4bf670a575d31e2af440e4af3d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRPIN1800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775e08edc2581bf2702ac5f5b25adc30af2aa2346a82c44f6b6d80ce92e7fab. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRPIN1800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc439dbfe84f2dd86fbe158eab13f5225b90e00fcea6a022009e4e6dcb4679f13. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRPIN1800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b5d40830ec7c1bf3c6a39123b58ff92a78b92bd1c5ec46972aa722e61f605b. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/FRPIN1800180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ea3e84ed911d1dfbd8a784a1b18c6ed0c88290a7677c7e51f13d6bdfcfe760. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FRPIN1800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad5870dc31c33c29e74e297311a95c756b815cb28cae1247b666dcdc4baf1fc. 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/FRPIN1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9502d14e71b316253297ded8089af6c1f14f5ebfb8f5ecb89e9c8e65ed86534. 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/FRPIN2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce459b243f1505bbb7e34118ce842be2e5d79b435ba124fea4e18607d9c07d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRPIN2000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e939aac4e69bcf8155f61841b4947097d9f11858896819b101cd398c1fae2ee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRPIN2000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fe651754ffd06b48be3f3e3b02bdf23b16b880c79429ae82403da4947b6e9e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FRPIN2000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1176c5979c7ea1fd0d83753b68359f43187298737236885acfb89ee04fedf004. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRPIN2100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a8a91850673175e389b23e33884be6471b12f595d03026416f9555e8fe1c96. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRPIN2100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d4ab8377482f70b23f68b7cb2bddaf7580daac3217e72e89175946d9e28007. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FRPIN2100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af94706535fb8a8f2abe019f652b54590ebb00b5bc1b9454658155b86774f3b. 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/FRPIN2100640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd68cb53c56874c308d8f98453614aaf0617a8cee02f3625e6c5f30e361dd40. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRPIN2100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfdf4fe70ca9ac3ad96604f60b11ea4e7719bfbbee39fc79a2b6864de4511d. 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/FRPIN2100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111e9841b662139decab0c55b80ea900ee22082b9c1f712f409372a2baf8e416. 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/FRPIN2100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f6b814e9a891bc9d915eb3b98731fbe43e7060235fbf0accc3a746e9ca2bd4. 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/FRPIN2100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dd24870fdd0ed0bd02597f6a071bee3ce2489315f9c52435992c297a16891f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FRPIN2100720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfdf4fe70ca9ac3ad96604f60b11ea4e7719bfbbee39fc79a2b6864de4511d. 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/FRPIN2100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f6b814e9a891bc9d915eb3b98731fbe43e7060235fbf0accc3a746e9ca2bd4. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRPIN2100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869a1b847f82f17a12ac386d2729e8106a4eb43a7df0e5587e2413fd360082be. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRPIN2100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae33f746610ccbd7329444f4e9303fc2787822c8c8ecf9b4dc42b0a54352bf1. 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/FRPIN2100710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d509913b78914a0e6d6f1e1c4bec8ff14f34ff9e79f76e4d28cd34ef863f92. 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/FRPIN2400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d596475694d2b98c4e23cb05280c530ad6782e39c0b81f5cde4c78e8cad3fa9. 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/FRPIN2400320.
Technikart 05 - Le printemps c'est maintenant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10e0a2d4fa737362d3f7a3013b1e7e736c0e2b7ef7dfb42e401d35b756d25f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRPIN1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b52487fb3a7b672490e444be2646fa0d5d7593b63b138bdd8d8af5cebdbfec1. 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/FRZ082300252.