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 0x43cf9762c1c5d192de270ce45568f0b5dc505aea8571b5f9123484de33b7463b. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cfe3a93-012f-454b-bc0d-88a204c01bb9.json and https://artists.proofprofile.net/proofs/artist/9cfe3a93-012f-454b-bc0d-88a204c01bb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Courting Stories: True Love and Treachery
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 0xd043b3a95a4a5cfb1408eb6256ff6eebcaf59b4de971a23850192da9ea58763c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA4Q31900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f00fc255f6c37d5dc2b7810c5823397404f81a53f143d3a6cca9cce3db1be. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA4Q31900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9312d6024e1c53bdcd19159d29d5a4bc57300c9303efbe8cbe845018d31c4. 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/CA4Q31900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd043b3a95a4a5cfb1408eb6256ff6eebcaf59b4de971a23850192da9ea58763c. 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/CA4Q31900006.
Om berg och dalar / Polska efter Alfred Nillson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2af9fcc6f9125bfaae88d2941908751503b9a7d3aa112bb9125fe92d3634ba. 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/CA4Q31900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ee9acb40c8ddf0871c86590a7661b8b6609c139f91b0ceafe5a7eaabb1605. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA4Q31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e5ea8365e764e0362d7a079318978bfb039be2f527704071c661964cda940. 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/CA4Q31900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96776bc67db8f9eb9cc1767429308205d405095d207c700228278e7aa959923b. 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/CA4Q31900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06489476724d6e916bf3c5bd9d044c5dac9d16401c9805b4fd7a0912a2ec4362. 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/CA4Q31900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f00fc255f6c37d5dc2b7810c5823397404f81a53f143d3a6cca9cce3db1be. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA4Q31900012.
Nordic Love Songs: Jeg lagde meg så silde / De rosor och de blader / Jag vet en dejlig rosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8d43be03954dc8572515984e235874b7523d2c1a181d260ba3f34307dc97c3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA4Q31900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9312d6024e1c53bdcd19159d29d5a4bc57300c9303efbe8cbe845018d31c4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA4Q31900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e10b6b535452ee4284d0817c48c57f2dc7342ca29803b57bf3190da1848d1d1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CA4Q31900015.
The Old Man from over the Sea / Paddy Fahey’s Jig / Reel du lourd portage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922dff356d48ca4a60965b0093677aebecbfa48fd82114a4349edec347674c80. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA4Q31900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25b4bf31a12504c9ccd0aab694f913af980916511f6b5ce5b38ced6ed20139. 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/CA4Q31900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe019963ff2010c6c25b2377868ef8ca10c18bcdec6ffc128291bda0f745c57aa. 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/CA4Q31900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef22b70c911c1db7d41b61f1ae7626d8fedcce8cae53cd41e111f179eba37b3. 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/CA4Q31900019.