200px|thumb|right| Baron Herman Severin Løvenskiold (30 July 1815 – 5 December 1870) was a Norwegian-born Danish composer, most noted for his score for August Bournonville's 1836 version of the balle
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 0x93f65fc26a0a8e79592b9e5c59eda6fde4e15cec9b3fcafdab53df6d7cf6d9fb. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e5e5bc0-59c6-4c6a-9fd5-596b70e0ac60.json and https://artists.proofprofile.net/proofs/artist/4e5e5bc0-59c6-4c6a-9fd5-596b70e0ac60.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x01270d6141539be221077fcf0e7fcbc98e00bc157ff6d80391ed27f627c1b64e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110101 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84087ec3e99596d591b4975e16676e4b31a2c003fd0536005696442dd1f199c7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110102 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d8f1862ea23df413d7af4fe3019cf09abd2b14938d22cc2604253096e82d4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110103 — a six-check JSON result.
La Sylphide: Act I: Fortune-teller Scene: James - Effy - The Witch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412f612ee45c4d52fa8cea96d6bb288b8d6b54ed1e16ff913773dc109a4d709. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110104 — a six-check JSON result.
La Sylphide: Act I: Window Scene: James and the Sylphide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2c5419cc569436fc1dde1cf1d34573ce37cfde0545b935784200a2306e4567. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110105 — a six-check JSON result.
La Sylphide: Act I: Arrival of the Guests - Pas d'ecossaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3fed56b1dd1b79c544f24c4c2b531391960e756d7df985253aa7fcbde41eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110106 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3656e4083f46f580e3aaf5ad9b6019fb0668c6948748be92095501a453f6c0ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110107 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb1341f7e5f68378708eff40fc5c14adba6b9ff4d74df45fd95954551462d80. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110108 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de8f73ba8f5e8b90595b34f94d925e017e6a8160a09557eb1098b0ec109d666. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110109 — a six-check JSON result.
La Sylphide: Act II: Forest Scene: James and the Sylphide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ecea084f8f060d2b41bc8d109b52a91800d4c547b84bd751810a3d900ee837. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110110 — a six-check JSON result.
La Sylphide: Act II: The Sylphide calls the Sylphs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0c4cdf9aa33ef5c1c17bb11af281359329e53d45ff1e62540b8cdbb499dad. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110111 — a six-check JSON result.
La Sylphide: Act II: Sylph Scene: Divertissement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3542853c990d7d673292ef013729339a4a3c1370143cdb0dc0e4a840a3b39706. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110112 — a six-check JSON result.
La Sylphide: Act II: James chasing the Sylphide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8b78e19d4670505d89237d3adeb130883f072114a77876fea2ee0065c2402a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110113 — a six-check JSON result.
La Sylphide: Act II: Gurn - The Witch - Effy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bba7c4e11985526b63765fca97a160a45615c2a0351f6601d8adf7b430cbc2b. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110114 — a six-check JSON result.
La Sylphide: Act II: James and the Witch - The Scarf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8133f0fb6aacf92787583c9e5832c77bc74d90eba70b3f7f152f7cbd6731ac. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110115 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3e87f6b41ca0e88d106fc72ce7a3f950a57d4859daafd40abfa367ace9fa6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110116 — a six-check JSON result.
La Sylphide: Act II: Finale: Pas de deux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1efa3ed2ad3c4756f9c26a8b73d6b9bce1edbc883746d6a4c4e26fd2f06256. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110117 — a six-check JSON result.
La sylphide, Act I: A 'Springdans', a Solo by James and a Pas de deux with Effy and James...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25bae000232c0793a6d482b66a0eeb4f8107cb6f7b513f063e844e079f8f204. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB209752009 — a six-check JSON result.