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 0x3e128e89df2ebda8b9d185828ab990e5c21514ee824744090a1b371ceb8095c3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c8c5407-ca45-4027-9ef9-48f8adfd7b51.json and https://artists.proofprofile.net/proofs/artist/4c8c5407-ca45-4027-9ef9-48f8adfd7b51.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 0x24cf4188c7b0e2a510b657cc148c43a9db2069554cbcf4647c3a527e7fc7c59e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA52125656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4b378535942cd2ab8b2dbc9fe76635f6eb845c6e143211756fc69e54125398. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2144942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77babb287a306c4596a5fd21175b513d5ade028b78962de7b770e12122b011b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFYY2240356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a3e22ab052fbf0139c8be3f47a0e11eae08206e4c91662a0558423cc03d0c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWR2207546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2636cc281ce205f6c1189413bb30a3c91e0d846b85f2369a8b76552512f7077. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB72265697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a0809318dcf1ef2061bab1f9db846c800ff91ed5cb554d05f7848e949a0d25. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZES52311730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d59fb80e0ec304e07187ead5cbb7d8f6c1c818e5f5b97706a5535b6097ac6a. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/QZES72360437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46e1723900bb0ba1b65cb8a19004abc8dccd4429b537da02218de0a5f51ea3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA82564984.
Indie/Indie-Folk Compilation - Spring 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc6eb498e30713004b52918dbcefc2f9b6faacc15c299e7909b2c74ea1cefa. 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/QZGLM2324109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2636cc281ce205f6c1189413bb30a3c91e0d846b85f2369a8b76552512f7077. 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/QZTB72265697.
Instrumental Indie-Folk, Vol. 3 (Alexrainbirdmusic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ab10129065f6948e176647fda0d490537f90fdc58d57904841a92da7bf1c0. 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/QZGLM2445790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7601cb2a8fe7d05364c3db0d8f764121d98aab51c5aeecfc5d8bec001fe25d39. 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/QZGLM2445793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad8e0ac9b574c37b29c28e6d1b573097791c7098e97909c37324497822a65c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTAT2211429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fd106e9ae9d79bb9b4892396cc99bc75baec050040f22d99fdc26fb0654c57. 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/QZNJV2320002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5fe99ac722bb59f04f4fadcc7d6606a03b8cf7c9ec7c3f69a2d86db69ba4b9. 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/QZTB52281234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf4188c7b0e2a510b657cc148c43a9db2069554cbcf4647c3a527e7fc7c59e. 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/QZDA52125656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a0809318dcf1ef2061bab1f9db846c800ff91ed5cb554d05f7848e949a0d25. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZES52311730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec32023fe7101e86736afc3a78bbc2ad413be6bbb91aaf2c54e092374920d24d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKSP42100137.
Indie / Indie-Folk Compilation: Autumn / Fall 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a3e22ab052fbf0139c8be3f47a0e11eae08206e4c91662a0558423cc03d0c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWR2207546.