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 0xbe68263775b7d3b60dd06cc879c78a13ac35ce5b0d6bac13a77e832d8aea5d7a. 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/31489b95-8cf2-4cc6-b639-9d06344fba98.json and https://artists.proofprofile.net/proofs/artist/31489b95-8cf2-4cc6-b639-9d06344fba98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Once on This Island (New Broadway Cast Recording)
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 0x7fed142d195abf21db3b35bca30d423bf7b1fd7c52236cd484f1ac5ae0694c0c. 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/QMQYB1811601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621fbe4538dc1c128821796f811842c0f0fb34a4e4f354d69564cbb4f74b88d0. 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/QMQYB1811602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0661d60dc567437e38ade9b6d37ffe81030856e3e31f2a4a6af2bdb0a9ae706. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMQYB1811603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4348bd95d1eb1dd2448520a0c95f247373c944f0fbc477eee6bc7341da06d97d. 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/QMQYB1811604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c1f53a760885e4fc324c9f6d77354d2d7d2f67fd5a91a5143179dd75da4ca. 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/QMQYB1811605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302aaded8f9320277ea1bcd5fdc793e0a700c473d0c3d49ba4ca792d4905d632. 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/QMQYB1811606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9d0588464c489b45ac17b551a8cd8a670bd3ddc294431be6fd45af6163bb8. 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/QMQYB1811607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee22adfdc656dd2dc0793173190b559d785be720bfb3501274ed521fcdaa26d7. 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/QMQYB1811608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1162b9b72be4aaca8f1daa23911442ba5c4fcc9ebc9af243715685c7af316b33. 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/QMQYB1811609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34d2e2d9da6789c537e5dffcc1c99ff07115f2218dd97f6f232bc09c16bc68. 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/QMQYB1811610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e300245220734d0283b0035935dcaf7da9e276714cc53d1026bd84ae39785. 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/QMQYB1811611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d88202dfecd085abd44753bc526a1130e9956ebbf0ef129e543adecf96e239. 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/QMQYB1811612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8cc6356bf3645b9af9bd7ad10363743e86694df87ab7e0526697223dcdbdad. 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/QMQYB1811614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c70f6f768f01fa7a604e4c704b773aa654085a11df6135d8bbcb7f8db54740. 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/QMQYB1811615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf0f16562e2ba35f9600c3368da4af4ed426f53f0163f671572c89ce4a375eb. 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/QMQYB1811616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f536d2340fc8489d26ad497c2f961c78695351574f0f30cb7884a3d6b3d62a6. 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/QMQYB1811617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b6f8e0d9f92f54f03b714711e851a1f3ea3cb434dd91879ffa343f55c38285. 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/QMQYB1811618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e07684c4504c2a97fdd39225e4b1bd15769631fc16a7cb89c8d07b04208f9. 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/QMQYB1811619.