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 0x15efb0b9a07dc577e1626fc008668bb9d3dd9ffa9b0a5754cc604499e04f8757. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94c4a11c-7014-4712-b35c-3a50261beab8.json and https://artists.proofprofile.net/proofs/artist/94c4a11c-7014-4712-b35c-3a50261beab8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
For Elise (The Lullabies I Play For My Children)
Menuett N°2 fûr das Pianoforte Kôch Verz N°2
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 0xd0e3eb9523f5226d8346ce80f0832f983fef5dcd3fb8e342b4514994b2e2c975. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAENV2063764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8c9cec6c1c301a85b10375bde6fb54851dbf485b820e4850f9adbe215172ec. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CAENV2063765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e07ef15d477106479e87d202997e489f67eac10d4dfeb257f3db13babc55c41. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/CAENV2063761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefa44dc956c7aadce2b2efe32f3580123840e3a89d92cc5e1ba161c0c624aab. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/CAENV2063762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0937d9178657d9f512940b3627e37eaa7233a84260267903ceeeafd39b590674. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CAENV2063777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5183cb70d6d6b1ce8e24ab1d0ca1cf24398b2b0dd1f1780ab22b154b462cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAENV2063776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b951f31742ff6c9a015c50ad12a73d45c0bc006a09a7832eac6f381e8aaa8d1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CAENV2063787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24b0475d6ebb15491a0616c5478cc52629914d3622f6a1023282798dca3de22. 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/CAENV2063825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8285bfa99e02d36e9366740477c6f15e1f78a91b63185b762bdb8b0cf06f85ab. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CAENV2063778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7bba7de47baa4a9331ca189a03ef968842974cb6c7e6fae06a9c913db0bea4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/CAENV2063806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1c53065ad67c61b010b6e1c6b512a80f7dac62217f92f8726d7bcdf7536e02. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CAENV2063785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226fec1c716fd86fe3c5b1b8c8315cd98f0c1e1904d797b62fcbc0b4cac94870. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAENV2063827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4e98084fe9b8dac47c154b969e80daeaaaa347823c37c8073c31645b1ccaa. 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/CAENV2063807.