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 0xceaf27293a61699db0f1fa9d0d540d8ddeb6d07f2bfe2f0283f8081ed0af6ff4. 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/ecd2f95a-d026-4724-8886-619ccc3e4feb.json and https://artists.proofprofile.net/proofs/artist/ecd2f95a-d026-4724-8886-619ccc3e4feb.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 0xe016454413d7b06e3e8262d89a21d55c2c724f5d531dca6c2e4f713564238dd3. 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/CH6541933260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d76a2f65a77789e604eac968279909ce8d783bdd1d6a37b231a5d054b7fe19. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/FRX452076632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac3494db540bfd36e70992b61b8ad581509db80c41e37d39803407bd9c17e64. 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/FR2X42028584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52914f27638246021a67628d983d4cbb15d44f9dc7f8976837f3f88e94186125. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR2X42028585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d6d9a1b951c5f3e1de9c199376ff23940968970e45ae853488a16e118382ed. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR2X42028586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201e07b6228f1e379510a64e5a57601d988c6c1d563b4377a052d15ce443dd49. 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/FR2X42142878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255d0acf230dbcedd9f1cf0e5efde04760f7b69c5e8ede828bded616ec40cafd. 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/FR2X42142881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f3e0e76a3e5f400ce35919abedf49ffc3c1d656eb0e92641c10ce40604163. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42142882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41d7f7ea70bc208be0baba201248a51e283b344a094217ab96211d82bcd991. 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/FR10S2335952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13e29e02cba4121960c0f9339c05afcdaa38c7f57f62e755a03797dc771a33e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR10S2335954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc1b4afedfc56ba70985a5f431853d8879df787f227f44f4feadbb2218b45af. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/FR10S2335955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27208dec7615022bbbeefa9c23fdc437da4e2f92a0335c65db3ee9bc3b4d69d6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR10S2335956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff19570486be1238d3e992b915edc8eb77379bad722b1de111b6141fbbe247. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR10S2335958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89c9fce0a90636d6acf00dd76210178ed1ce6f1ad2df02629dadd0be50a931. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR10S2335960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce486475226ab66a1ef14d40434d5a251ce83bfaafd2da661999a6b5e589d8c9. 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/FR10S2335962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08adbe8094f0c14bf39d029c05da646e364033d95c86e57f385c963e08cde5f4. 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/DGA0T2413297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02cd048cc6076b2c3e3c707ab93dd9977eb2c805e6ab91bd4713ffd4d2216f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX452226848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bf8c31f97973016239a5c8784069a7291d097dac1b992a4c6499af7adc39ab. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX282336496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619312072ff36d42bd78f98f93be772f03fdbed6628497b3261dcbed32127e1e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762101770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2724b5d5bd6ca8f1ea1d18b9d78b54b1777e41dcfd27ecb06404bdf535b525. 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/DGA0L2458813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce6fc4422ef9f8858d5730cba46519379f6fb5025a6c6573393dcac829e34c3. 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/DGA0S2427394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe5d503bb12c00e6b97ca4160480b42525cd6d90a9ec8283c22571e6fc8c85. 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/FRX202468133.