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 0xb3b98ff40c35c8b974009eaefe2e6339b93a309768b530e8da83f92c564d833f. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ec318e0-e94e-44a2-bce0-2927921b3a30.json and https://artists.proofprofile.net/proofs/artist/7ec318e0-e94e-44a2-bce0-2927921b3a30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110101.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110102.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110103.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110104.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110105.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110106.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110107.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110108.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110109.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110110.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110111.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110112.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110113.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110114.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110115.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110116.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9110117.
Les Ballets de Monte-Carlo, vol.2 : Ravel Gershwin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bfbd9386e4176dc454756e5bcdff11ecf9c93dbcdafc043db54b348c197309. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRZ179501210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf9ea1d24f3650f56198f2675c18975c42cfbce15e67577a34c59fb254be55. 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/FRZ179501220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2b0c132533e574912e10f83827931287afc4f75ee8eaac8a157131ed96c227. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRZ179501260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00cf9717464d4adea14fa81d2857f3af6a95a9995849090407e6ce52c585aa5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRZ179501280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220ff6cc2db531a65c2de0f856d24ea5206ab0f4bb13ec5026f715509f9a16c. 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/FRZ179501300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd6e1ba8a0eff25eb3aa27ca44864d293863ac1975d0309c808371cfc276ab3. 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/FRZ179501320.
Les Ballets de Monte-Carlo Vol.1 : Rimsky-Korsakov Borodine
Ireland: A Downland Suite & Other Works - Bridge: Suite for String Orchestra
A Downland Suite (Arr. for String Orchestra): I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349afc7cc132733ec95118a8a97d1de329731ceed9853af7b0034a727cd7cf8. 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/GBLWD8502701.
A Downland Suite (Arr. for String Orchestra): II. Elegy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f21e8cda5c3df4ce9a25db85056fb6198ae6844deb9f0a80d6d319d016a313c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBLWD8502702.
A Downland Suite (Arr. for String Orchestra): III. Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac787cb9b56c9e6505b5016d18db53752bb7c2fb235aa7965dbb9fd5889e911. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLWD8502703.
A Downland Suite (Arr. for String Orchestra): IV. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9170ca2fbe6c3828540a7e6f726c0c2071d0cfb51754642e2b1779c0aea1f271. 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/GBLWD8502704.