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 0xf3a5e53095a161cd91136ce34ba5424b83eeb6ab144eba68139f0363c339d3d6. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b05c4497-4893-4e46-85f7-bd0310d275e6.json and https://artists.proofprofile.net/proofs/artist/b05c4497-4893-4e46-85f7-bd0310d275e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kim Sjøgren plays Paganini and Carl Nielsen
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 0x635ae44659e77c3412c2db678649ed00d70b2de6e446231edb4b876c7161408e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKMV51200130.
Lalo: Symphonie Espagnole / Fantasie Novergienne
Mikkelborg: Everything Matters / Jersild: 10 Impromtu / Holmboe: Duo Concertato / Koppel: Duo for Violin and Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be2bca7835c2ee1c1de5d9f319ab4a151d2864652b6ba7e4db3c40eb780e23. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKABA0600739.
Nielsen: Violin Concerto, Flute Concerto & Clarinet Concerto
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: Window Scene: James and the Sylphide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2c5419cc569436fc1dde1cf1d34573ce37cfde0545b935784200a2306e4567. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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 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/GBLWD9110108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de8f73ba8f5e8b90595b34f94d925e017e6a8160a09557eb1098b0ec109d666. 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/GBLWD9110109.
La Sylphide: Act II: Sylph Scene: Divertissement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3542853c990d7d673292ef013729339a4a3c1370143cdb0dc0e4a840a3b39706. 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/GBLWD9110112.
La Sylphide: Act II: James chasing the Sylphide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8b78e19d4670505d89237d3adeb130883f072114a77876fea2ee0065c2402a. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBLWD9110113.
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.
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 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.
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 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: 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.
Violin Concerto No. 3 in G Major, K. 216: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8d6065184888f5b264d0dc5fb27b90aa557ff8beeed1e7b5905af1dd90ae6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEAEC8482010.
Violin Concerto No. 3 in G Major, K. 216: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9558bb35b201753efcb22a73f6635e5847eef8af6f0fe70f42cd5bbcbbfd15b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEAEC8482020.
Violin Concerto No. 5 in A Major, K. 219 "Turkish": I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d744fb3859174e0c2ba56ce88b1705d1cda2b57484469a7f8894f4ae3aa88e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEC8482040.
Violin Concerto No. 5 in A Major, K. 219 "Turkish": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd261de508c46a2aa605332e84ee3a3a1330e80bd2d1fcbdaf82032f224563715. 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/SEAEC8482050.
Violin Concerto No. 3 in G Major, K. 216: III. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78e9830279a934c06d97e3bb20cb9f00480cf5b852f6f5af9ee75415767b257. 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/SEAEC8482030.
Violin Concerto No. 5 in A Major, K. 219 "Turkish": III. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7d5d5aa714a245378bd8392dc02917ed6aa1e9c67ca45faa3f8bbeffc4995f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEAEC8482060.
Den danske sang er en ung blond pige, CNW 271
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0937c420042ec86eceb729bd06728412931724b74eda170dec9e0e5947b70055. 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/DKABA1000286.