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 0x4d1690e96e60e47bd22093dd95d9e6c659ff88112eedd72d45aabee9ff9248a9. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbb7513a-5150-47ea-95a4-d99308b387b3.json and https://artists.proofprofile.net/proofs/artist/dbb7513a-5150-47ea-95a4-d99308b387b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aria from the Notebook for Anna Magdalena
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 0xd43cf479cffb12550c3d751b32065f955cfe0c588b2b0a577ecdef21ee4724d9. 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/NLGM12060005.
WoO 79 - Funf Variationen über Rule Britannia - Alternate Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099df9cfb661595fe188a914c6a12d07bf76291bf318c0190f2b83fdb105952. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLGM12060009.
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 0x4a957ab8ed20a5d9818368f27e06618e60b931d5995e2e7677246d6150481038. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NLGM12060015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091ecc6558de4fae49f7f44a1a0a156f24133b271b2b22a644de5e68406edb13. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NLGM12060281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a3b6e24c0fd7e459c95512fdce06202186f5907b2e042ace60d8f13b0eaa01. 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/NLGM12060282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec1c6086bb947a7eebe6e7da1312b8f2b4b5aa4cf4543d885b34ce697db964c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:09:47Z), 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/NLGM12060283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fedaf9319436946da0f0d8c6a517fc213031ac4ee9db0a32b94c26e212a3a7. 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/NLGM12060284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d768e6e3b00c8f4e99cc87f7904100737b8bbd395646ef9e2635a3a0209e188. 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/NLGM12060286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3088f847d1e8c317b4a12c1a383df5dfa11aec71cfd564e0750e1df4841cc5fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLGM12060287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52118d186bd79076a4204609156c2c4306a7f7137bff01097165235da4bb4b23. 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/NLGM12060288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4380b7b04de5e1ce963c73b87b8ccd8c8f41883cdb500f1454cfefd93bde407. 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/NLGM12060289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb794e45b948d360b53091cac42cdcf90e3a9ed7b9a2d0ce9cb0b1f1e5c307d90. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLGM12060280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e37fce967c3f04c005d45f296613d1a9f48dd0dbe5e03199c4597f64f6500ea. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLGM12060285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55013360b5bfba2a7e11496222d23c39b002ac0b0a97f2bf8c69d48690b9a389. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLGM12060290.