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 0x563c94582f5a9ec32ee0358cb4295b2b74a2b12c5d82c3c5d8ff0c465ae507b0. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9981e72-11c4-44a4-9b02-41e25bc72cfc.json and https://artists.proofprofile.net/proofs/artist/d9981e72-11c4-44a4-9b02-41e25bc72cfc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello Sonata in G Minor: II. Allegro non Troppo
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 0xa122cf1d3a05a40b1a7bcda281c3b1166fea5e53ee8d3998a1cb6ea52c6fee32. 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/NLY332300062.
Cello Sonata in G Minor: III. Canzonetta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915121ee088f8cf013f62d4f295c66239278897896380506a5fab1303ee47f27. 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/NLY332300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119501608be32a89056ab224a0dd7a3fbff1b5e47772d67e16fc4a6e12fca481. 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/NLY332300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b878100933831e488226c56af288f22b4ae9115ead5108150f972c6d8ced6. 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/NLY332300066.
Cello Sonata No. 2, Op. 4: II. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd60b99691da56211c986157f862feea07861ca50401f04d59a9d79dac1160e. 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/NLY332300069.
Cello Sonata No. 3, Op. 4: III. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313beb01b0b87cce02c64809e118bea1364c95af3fe8580803e19f9e0909dcd. 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/NLY332300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc532456a7d908c0ba7671800feeb86a0dd8e5da90475abcc28659e1eba2f141c. 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/NLY332300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc3440b4bf138b09cda55cd36624c3a219fbab307a4c004cb8b3420caacb93. 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/NLY332300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac67fd018a2cc13032e1612b5df22597d3e66cb43d367701a73798b9ab78f4. 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/NLY332300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3cc7ed41f11bdd43d3bc0f2c46e6ec2c0d685bd3a614758426a6c6858aa0c7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLY332300061.
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
Cello Sonata in G Minor: IV. Allegro Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33ebad0d8d6d8aa24eb34a9e77742578b06b2ee3d8530dfd6a56cbff3eec1e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLY332300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a2f85205cad365fa994c51a5f5a1ea31d3b12d4aef736511667fff06bcdb47. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLY332300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3518921900a833cf72bd30a61f3b6078f5d03ebffd9b08a3a4a65cef68855448. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NLY332300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbebd6dab66885df6ae30eaa8cc040edd33940724b98325cb63e922f4bc5c4ec. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLY332300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ee195215de2fc9c0424fa0a9fcb7e10d4aa21dbdc68989af8b57fefe34368. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLY332300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f56c459d4625cff23a24207ebc291a1017993e65e64c07dae5b746d0092f953. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3aaacf8e0c25e9fd9aae50ebb02c7e6da7e76b400fdf06b592ee9dae64f0b7. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLY332300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30a095c75084298b85a4ed6300bce4cf721a231e6dc90b25e6deaf260a60f0b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLY332300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f2791f2acd1a7a3c7bd383421e97b7c492a9e34b9e1e0bd6c0dba85d45f30c. 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/NLY332300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe771d78e4a092ef016cec580567a8022d8dbbe80d3dbecfb633530a02183abde. 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/NLY332300079.