Leeway is the amount of drift motion to leeward of an object floating in the water caused by the component of the wind vector that is perpendicular to the object’s forward motion.Bowditch. (1995). The
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 0x8f879c5c2765a23553c087f9aff66bd11013ba3317b4903b0abfda2f744bcbd1. 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/9119905b-5b38-4fad-a209-f564b8b8f28e.json and https://artists.proofprofile.net/proofs/artist/9119905b-5b38-4fad-a209-f564b8b8f28e.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 0xee9359cc5661c628f57b0e68c65a36c24c1bc6662ca6ab410e0f39ba17dbb384. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMBZ92024990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a3a81ba4ba3e0c3507b20d2f2b95e1fe7a017b3b572fdfd48ea69d54e9f6e2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QMBZ92024993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87f4b06ae2a288088f152629bed0a6bf694f3557800baca2a733e228816f62. 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/QMBZ92024994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca05fbcf28caa39a2cf3a25bb2d2a8e52ea3e8fda0572ad27d3508aedcf897c. 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/QMBZ92024996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e21cce528ff8cba155c18a268b0f61f1c905499b7a73764f365e1b2076fa8d. 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/CH6451508286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7d78b08361d7207fafcfe3e16c52f9b3ef9d219e2ec08cc53aaccf8f9e1c6a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CH6451508287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199542c1760a160c082e8fbc9fbac1ecb1750c475f6c22045fa59770ed35cba. 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/CH6451508288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098f825a0257eda151a54742aedbba28bb1c7e755b60c23050dc3a6bb8f5bfe. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CH6451508290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeab64620a122791cb441022872f70cf14d8c90167007864118d410a0174318. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CH6451508291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90235f7cd99e741ad5e33ba538f3c8484803a053a73f3c6b97316ff2c17855b5. 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/CH6451508292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd1f7983b294ecf62c1353972269f1027c41e8a996f98bbfb08716d7575551c. 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/CH6451508295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1bdf32a2dd5486949603d36f3572d6cbd990c588d9193ebf5678ac5218d361. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CH6451508526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf3b30cac81cc57dab112333f4539b5530425a677f5972146eeeee9c00f2a0e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CH6451508527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc622c4671ce1e0903aee7cb26f2da1a527c86d6458c21cfac254b2c1541e48b7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CH6451508528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec69b177bdaa11958ef1b9ac14bff54cdc459b215da5c3d5a2071da94994a48f. 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/CH6451508529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fb97ce01488d0ba27f42089ffefbfd491cf3f8535490614d34559898833411. 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/CH6451508532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf6fa978bb5eef3890080a8bd9315016da3dd532737a263fe84d8ec2d235072. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6451508534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a477cbbd8930b576bcb617f57a552e7001d35f75cf01bbdaf6f9225be5ae42d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH6541719018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10630e09c643d47bfba1cb6767e588aff8ccd70a27a648fcd8c0202688108d9f. 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/CH6541719019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71673309acdb227d7a7a5fa570eb07cfc00d5848767fb86187b1ac5d498501a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CH6541719020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ae765056068e9227c028a50dd1d518d82d3a641d25439d4f2dca85d7cf6f7d. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/CH6541719021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec55cc5f1b1d05f184a7cb7b3b530cb28d6e909bd49d408e6b625e325e47267. 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/CH6542479801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a47994308bf1b56fd783854ea8f7ccf37a228f55350b858b89ffc042ce03c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZRP52202601.