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 0xb570bd74360f80439c1ec43492f40e3be4fc221d8b24cebd8f90ebd39be0f29d. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1af7c541-1eae-47c5-bc91-028d02bf526b.json and https://artists.proofprofile.net/proofs/artist/1af7c541-1eae-47c5-bc91-028d02bf526b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Malý princ (Original Cast Recording 2022)
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 0x45c75392f8fd275195e4187e80b4b6ebddebe7d4655ef1bcd00f8799038e71fc. 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/CZD942200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf138ce2b06dfa84e5d7df25405ba77c182ab5a51865e476bf00f480ac5c89. 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/CZD942200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f24732db9a6bc3b660cb9bb1f3e742f705a9d21ac4218c65aaed5710517f050. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZD942200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e8d7c3e96040e7c73f004a253df3a1993b871fc064b954804db59851b55b88. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CZD942200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e0fdfc6df9d872788293a8d9e3338e53860467f7ce5808b8a7281e7c364d7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CZD942200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b6cadae49c3308d9d642cd2ae5ea84aef7b0088f91a643648f576890b25a4a. 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/CZD942200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6b7998aec4eb3fee5dbda18a0d31e9692417c2008b75aa3503312efd87493. 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/CZD942200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ffc98a3ba93b9d989ea5009bdeb76c332363e92d5d096a5f2f5c6c602d2cf0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CZD942200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6915b5ac01496a59d600ae89a7143f2a7d757b29151814dbfecf70ea4b8d141. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CZD942200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a84fc34908100e11dbd5041722194075fa0f9f31269a4d0cf4ebe1264e42a5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CZD942200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc09c84204f9851b5cb93be3dd1994b0b07abbe03868688662db44a0cb7318a. 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/CZD942200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61598e743b2d66b3f3f8b11325d4c59fb18c4c1b7fb2e64dfe955e1ac81be6f3. 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/CZD942200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736e96e7d423cdf2d01480d4e26dd001d55445dfbb6f513eed093a8cc92fae7a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CZD942200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54651acec746ed515ba81a8ec50cef4ce4b1085ee0d8234b61a071f34b615fc. 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/CZD942200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb423be7e51fe144dc2df1b021910c440333ba8979b91eb6d772c23573042c293. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZD942200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15be55bcfcd6465b10a062b18ba4a53c0c381721f39cb28bf4948b7b53852f97. 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/CZD942200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4bdd45705ab93f3d233fd18277ecd4e7716ecec92a89e6a606c48691a8134c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CZD942200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fc7e27235c59d37c74acc70e10c2c4013578a7ea2ba4aaeb62d1d5562c07b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CZD942200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684696a3aae1c7863e3b6bca5331b24f2a2180e1996c05db180120f10766aaa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZD942200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cec1e72f8d326ac6a9421ec12feb82ce911604c8c57c49940bb9038ea73bcbf. 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/CZD942200187.