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 0xa943c04a8972dd2331a771e32621a8c7c17dff5df09b35c83a5e8969c3af0468. 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/b2a42f70-404f-47d5-8857-4a6673de3bc0.json and https://artists.proofprofile.net/proofs/artist/b2a42f70-404f-47d5-8857-4a6673de3bc0.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 0x29523e43a62819416c0107af9fd5870d8482a1b1628a10e84eb1b269fe5f2ee4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAHQJ2322587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f689b2f19316417f8ed89d66f4a1cd90b08e7c4fa17a230d72304520d13c55f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/CACWV2345027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a92084cf8db0e0ae425174ef2df62fa7a5cfe2df81cfd81056d996d1e419de5. 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/QZTB42315894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097a2ed37a1617d4f750e10e2777f394b21e1f0bba773aab7b849d27ebc07e3. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTBB2374192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a370f6efe1a67a93a737426cf2bb3b2b5ebfbc87095ab6af1b8365f604175. 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/QZWFJ2323389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8180b641592e3f2981621bc688d9d0c43dae1aceb9e49a527584e88b0261b8a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CAGOA1800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96354f97787526801e9932af765558c8ca40515173d007f0c81806cdb421c96f. 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/CAGOA1800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d884796cfe5b2cef3f428a887e7ae9234d8876233b4ce045e5b5bc6c79fb0f3. 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/CAGOA1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec957a2bc8ad11028f0d80b7b03dff849d3dba732aa87573cc04c523c0ed2e0. 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/CAGOA1800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca5a87af88c5ca5b2f8583de884df52daa9f606088558ed854e7635ba2f445. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAGOA1800248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1590460ff48f759d0d631b3ba222935b1e0ae92a5649633065ff7a8bf248f8be. 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/CAGOA1800243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019c9961f9f095450f84bf76fc074514bba41e4eedbe037a9c259c1ebe240a0. 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/CAGOA1800250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf070a7dac84bd4a68d754765614d4feb64f64077c7d50220e9cbb0a888fa5c85. 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/CAGOA1800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96354f97787526801e9932af765558c8ca40515173d007f0c81806cdb421c96f. 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/CAGOA1800219.
On va feeler encore magané demain matin (acoustique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa6b549523a63e45b20f5c92a41b0e70d48af479c13732ad5dc3b3cc63dca0. 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/CAGOA1800258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6846116ea128bebc16c6f320179690bd2bef63d67c25103ce685523fa0249c0. 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/CAGOA1800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74ba1700c820c1c83d9491c6480cceb32355b151b163f5e4bbf3ec196c5d5da. 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/CAGOA1800261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa290306246eb467f81c479cf62686052e57773ccbc40352eea635c9628d6549d. 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/CAGOA1800262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9459a48ac0b34498afff5b483d2c91cbeb0d85efab611aa43c092988277da04f. 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/CAGOA1800264.
Maintenant j'suis en vacances (acoustique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b9586e72e09d233e949633b5cbf7cd3fc7b862c77065d09eb595323761571. 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/CAGOA1800265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8836271fcf816eb2edcd36fd3c0b9d7ca4094b50c729cb5e4b83640c82523f. 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/CAGOA1800267.