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 0xbce3fe1007d10dac97c427d5fd686c23643e7cab00f25b350d8a9a2146e328f0. 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/70b9a98e-0697-4e71-8740-b4c7c25cd30d.json and https://artists.proofprofile.net/proofs/artist/70b9a98e-0697-4e71-8740-b4c7c25cd30d.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 0x0e7b841ac47c39152069697c5cca6c01448e5a8df07d9130695530b19f27c1fc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR7Z82100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aedae8318ff373c1c13489b0431795c07d9100a03470c7be4fdfdaced6eae7c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR7Z82100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9a92c992fc8f2e46192cc7bd75f3514edb12f1fe99828081d6bf05476192a. 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/FR7Z82100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e073e3fa7a06ad2af2eafc2c619c6d18af3d371ff525f60e1b7fd9905be23f. 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/FR7Z82100028.
J’aime bien m’mettre de la crème (sur le visage)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e9428335b2663a289fbcc39ed0b3e63eecb26fa26ea6da7997d163194dee12. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR7Z82100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b86773f456e99ea9a782bb1b8e98b320a9817dfdc61e3df12ea90fbc46badea. 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/FR7Z82100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb978e19394a6180748f167fb886e0527e9ec2a4ee72f5ba9ccc92821d29b5515. 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/FR7Z82100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb4efa5b78a00bc6adc56734cca84138b6834e4505e159a67223627054dcaa. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/FR7Z82100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf583c343db1397d2865102a6b049c2c2a230df7fa594a02533ef4382971654ad. 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/FR7Z82100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f0b758ba600b69481d60a23cdf4644bbe5e9a45e67c7e3eebbdc7ac0dd6190. 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/FR7Z82100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67deb4e3930ff8f9288282c77ebc12281aa6f9bd41793d77d8d030ca1364ccdc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR7Z82100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d11d3547388bbd3a1c95e5d645e5e95d6e6fd489465f51f58506a71d17af6c. 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/FR7Z82100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb498f331b93767ffb7b2dfd5769fe7f889591de187a3f154c5732600ea01c1df. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FR7Z82100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c43f446397a26e569746b79d5a786a76378b071b0e5a8501cf0b30b26e44f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR7Z82100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e756a0760cc0e859082b114dc9265dd888a470022d22e64651546d2233e228a. 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/FR9W11404786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61c2d10a3e4a9805a4ac08a5b47a93c76e0865783b47dde76a0913f23c1e854. 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/FR9W11404774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ed69b99b39ed6944277cdf2c283dee48a700b49c754558594ce56c78739abc. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FR9W11404775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180bda1de67f0648044d21eee045a928edc6f28d5332d8958b64705b1385ed1b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W11404776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724150eeb0ac88fa7244974380e97d2c191fa76f5245b6a30b3e5956cebaf1b9. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/FR9W11404777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2483a182e0108cb9933c4a5c7cd3a239687403e5a2145ef2affa9c628171eae7. 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/FR9W11404778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d235a87fa66471155d357b0a882c3079f8f4568c3bc5d1de9d7a7d532614e1. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR9W11404779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe070a090ce4eb1f68f36fc8255bb097ac25576190d5618999fb4645ed3a54d30. 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/FR9W11404780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c88b273526be20c32ff38c9287e2bbfd0db4d54c2baa8860d68100cbcd8e59e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W11404781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a9ef0e51395600815bb0f939b194eaf2db1481407f1700680b94b3413e945. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/FR9W11404782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdad3dd78b04c927c7ba7043caf0f3cc758070f939832b00dacb9b7197167a6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/FR9W11404783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc664c43482d08876dc87f56d15e8b29932989890d5fcd4cc151c157101c565dd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR9W11404784.