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 0xfa1abd925b346e220bc039aca4a667fbc76a7c8fee6b924f0858bf93a2bcb7ef. 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/b32b6aa6-42b2-4c4c-b739-4cad2770cff7.json and https://artists.proofprofile.net/proofs/artist/b32b6aa6-42b2-4c4c-b739-4cad2770cff7.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 0xc849d23c553be4ecfcee12f740adfd6a84a1c0fe5a3e1e2105ad20fdaaf045ea. 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/CAK472202501.
Sikoyo (feat. Branko & Fédération Internationale du Bruit)
Noir Fever Présente Moonshine & La Fédération Internationale du Bruit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a73388c8dbb1e25b0703fecd3c2bc25c725ffc1a82f95de89eb9015b798b4ab. 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/CA5092300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0588ed0eb3a942adb3a25d6442c279d10f6d1d4bf7c25daeef6a21a2263f3f2a. 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/CAK472205908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a61a477bd15d0ef2aad7b45ecca0489c93d9f409acf096d39eb38d8d8db5ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5091900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0243a06329e22400a7c778a4583eb86d9f3898f360c3a937e0f09f7b4f08138. 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/QM37X1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d6698e9c0cb2a83471e4ca5b376e95e509f30ca2b1e10d4b816077a210b31e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CAK472103303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ba2c8e8d526ba1927c136e9900dbdc66137914611fb374468fcc4806a7944c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAK472103316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a73388c8dbb1e25b0703fecd3c2bc25c725ffc1a82f95de89eb9015b798b4ab. 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/CA5092300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849d23c553be4ecfcee12f740adfd6a84a1c0fe5a3e1e2105ad20fdaaf045ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAK472202501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e727b733bda4a30782e3386234ed20251f0acf92e1eef2d2dca3b8bfcb554f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5092000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468aa4596e451a393444b516fab11eaa0081b81673d1de135289f5cbfdbe3b7. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CA5092000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e40b88742ada9560fffeb9b79b80c8413dc826ede05a82b8875a5545a7c56. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CA5092000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a61a477bd15d0ef2aad7b45ecca0489c93d9f409acf096d39eb38d8d8db5ff. 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/CA5091900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6162034c6f506481d96843c4abf22d8e8fe6e6d97b4ca633b2072a3710e2987. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5092100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b7998aecc04dc8faadb7063e8d9e09a9c2d9ad7931c8fb98925553a465e5b4. 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/CA5092100302.