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 0xc05e502908616fd6b17c1180ac07cdaf38197bc047f0c10e0a58b1e639f63860. 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/0aea787a-17fd-4b88-9dd7-cc80ba48e1f9.json and https://artists.proofprofile.net/proofs/artist/0aea787a-17fd-4b88-9dd7-cc80ba48e1f9.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 0x572b2f0f4d207a64d37a053db8ca0773a6e227a7541494dd68b3ba546707dfc2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU2484231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2df11c5fd66ec6a90e90be21376617197e2f52c32c386c6b69043152f9850ab. 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/GBSMU2484232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2223dd0f5fdd5235c8fe4c1239e2c17b37940684ba02633cabda7410540b0e46. 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/GBSMU2484233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142452ae28a1e639049f511346896ac171c0cce9bb3cc6a8de9b4ee00fb4060f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU2484234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9f0b246383bf05eadeceab665961d4bd5775266c0a73514de3f5a4e37d5cbe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU2484236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39a8c163383ae6b202f8f49a4b861d5b0cecbd0c698dfd1c92e3341dc7f5e98. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU2484237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4543749f58fb5b8712c58d50899b29f6118a8f3939dae059c8089ca4bd935643. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBSMU2484235.
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 0x53040c38744570d0f296abc5662286b7e8b0f98656283cb256f04579f76b4ac5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBSMU2484238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4c5c31a4fd77e24badec81fa6955cc069587e9e5c77b111ca85e96ef86d353. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBSMU2484239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf57a1583833aef5a9fa73f828733bf8306a444599900abc8268fadadf808c5. 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/GBSMU9800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6757736b12042bef922c4ccbdfef582560dfc44b014ef6e7e1528fb97b72ec0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU9800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4f3eaefaafe3dff46e42912e3eed87f939299e170a70962642a653e0e1f41c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU9800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92999f6e9ecc7cca9e4a141bad12dbb7ef0b11e11cce97e5dbdcfd45397ce34. 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/GBSMU9800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44486c2b1eeb403593ae3ce9d48d9defbc8c6571def646a5f1c95aec4512a06b. 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/GBSMU9800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f387503bd5268eae5b1f1d61c817ec46062179a02ffe579ebccba8fb0e8ba6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBSMU9800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31469f798e4786b9d26baa53f50df5a954a64448fdcded4cb10781d7873a5eb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBSMU9800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531bc81ca50a89c7a1bf3d43d8d7ba89d5004397c2ab560e72ce5080a7b33e69. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBSMU9800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d2911cc5a7b07e4cd2ca2041530b6e0acbbe548f1b7f13a6deabc79c2cd046. 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/GBSMU7198126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4635406c21e062c324a066e99141c0d8e22cff49760e20f1df2271543f1211c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU7198129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100f24eba2b4874febb9423cdd4cf64b5aa0c566551b104efb8d354a3e5f78f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU7198131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771cd239bce9dbd379ee401eede995816153f004f2c3a8cb60fcc5b231bf12fc. 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/GBSMU7198133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce82338ecf047554b52b30524579711bd96442f70955164d1d7d60eb2dbdeea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBSMU7198135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b82c0da910d7389ce335e452c30b9196545f9488febdaf90ad650b3ce724746. 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/GBSMU7198137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd921f7e766114b72eeb9bd67c11ad4797446d51a2b47c292fdcf5e44b068b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU7198139.