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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478efa66dd2e5082732a0528acd37ee381d2eb740dda41a6df3d11bd434cd350. 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/2485d5f9-9eeb-4914-90ab-b130c42d96e6.json and https://artists.proofprofile.net/proofs/artist/2485d5f9-9eeb-4914-90ab-b130c42d96e6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b128b7e15c76643545cdf24f86ea991480fd8066ecdbd2ef24b03fc3287fd99. 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/QZMEP2099376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb2991d59c9ed2380129ec3e27403d289cec579e165c6a12f59944d1399e805. 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/QZMEP2099377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf6b38257279412f9fa523a6580842e7534728c72f0fd9f5609852d8240474c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFYX2141700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94e01e9df738c9aee0ad9081d1d25077efaae7d44818d13b14697da2a205127. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWW2283618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd49c0266f8a504ab0084e947e6da90f9349a75ec54d067f806c7b76af7b7acb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWW2283619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21009744d0a5c98885bae0ceea69e0b49e6288fc78acf9103de7f1a6973784e3. 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/QZNWW2283620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3af77f28104b5633478a515b0b0e1c7f990d560770932e22d3323d840fbc369. 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/QZWFR2332128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e66e08a0fde2cb6e51b9aee4206b74961fd5829938f3d2a74417a6e72417d. 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/QZMEM2457105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23d1d567c2eb8eaed8e93be29e33bd0d3bc2a4c65f08ed52688bd4d635af413. 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/QZMEM2459721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ed3822946774e865e267654120364e910064e4673c6fa23cf13c411fffb32. 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/QZMEM2459722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09fdf4b72e54f767ba60226c44ac17724c448e14d6b6f48e46b1642a918d943. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPLR2436185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d8259650ba95c82f0b455ab3ae70aa09c3c6d2f9861fe969a325c0a22bb1a. 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/QZRP42459699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95eb150c9b47a08bb771889bfd50fa0d388b993e753cb04988193b3710ffd1e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP42459700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84de74fb1956a55b9c4d3de0459a3f589e123266edcd82fb3bad3cdef230b7b8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTB92462654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670622da7aa58e6c15733a22498427a7b3b65c72b7c469303ae79ae3e6d7f5a3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:53:18Z), 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/QZTB92462655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d483c732ef278f4be81513945bd8707463648848464453ea5e2ce7482850fd. 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/QZWFX2441768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfc5b4a8bdd647bea54ab04bbbc73809b331935c599945eedf5dca8a7b5765. 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/QZZ782419737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6c7b0372743407e619145b0f9a9442ed6a269b84a944187e8841469fea939a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFX2489187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d7815afc04124a6d292b39223873487ea337f8109f35e9d3397725de08723. 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/QZFZ32549647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330152bd50980b0712f23589614a134bff71f9c1769624b0cea6b6476bb7ed39. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:53:09Z), 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/QZFZ32549648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7ea33439d9416da4bd50bfdb9891bf24a75e0d494c1687d56a6b06f618e0b0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT3EZ2583708.