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 0xbf736f9907b311a201da873152d4bf454f6b2fdfe221b31f59a7b3eccc362386. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/450e6d06-85d9-469a-87eb-2f5bdcc73ebc.json and https://artists.proofprofile.net/proofs/artist/450e6d06-85d9-469a-87eb-2f5bdcc73ebc.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 0x4a5c2deec3079a1108f2867cf460f651c8efccbcc3f8a45af9823110adf2abbe. 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/US4R31500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdade497db1e0ed0f84b0903c2957e47f92f6c1594341d8f33ca36e8281afef89. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US4R31500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ffdd85eac9b047682d652065907a2c3829027d9d409fd0460b44553dd8ca3f. 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/US4R31500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc06384034f7b3550fc2f867a64a476f99f939b46b4c422477d1bbd3dc1c4e8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US4R31500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58e154efa26c5b7a4a55d64edf8014df411e0ead08bbde086b598cb9bdce579. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US4R31500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337396d4fc71fb3c68763cd9180861eb02d5d0e8d6107eebcd7efa80cabf8a4b. 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/QZ2K31700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4ec3a8b8a6175ebd4392dc407763bde1ce68a7306f0230d9f9c0a422951862. 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/QZ2K31700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5b1e6242f599bc5c972952cefbb2a31b3d8984e204879a5d0a0417b8767c0c. 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/QZ2K31700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8867d98c0757af9f5c351a1fa418b10e54820dcdaf14616ddb2c547ce6e047c. 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/QZ2K31700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4755c917c39bb9a1c0ddb472edd6387aa96e981b46309ceaf2ef702a081016d9. 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/QZ2K31700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d5bfb6bb21b4f22f13ccbcf3ee3fccf52f85dc855be21696f93655cc4347e7. 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/QZ2K31700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01138794ad399a6f6f099c48497f6de934ca72c08cdd90ca70862cac3a7f711. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZ2K31700007.
I'm an Old Cowhand (From the Rio Grande)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc884f6e82ca67bc5c51029628845fe6940e2b1703a689df31c848d0cbee65d54. 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/QZ2K31700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18504867a3cd5965f1e3026de3c38629d23a4f8a39e624308808f52bd25fe95a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ2K31700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7aee74fb481c05b5c7ee1b232acb95600e274efbc34ecbc2fec40f6d81a45f. 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/QZ2K31700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4940e2abdb1b9676c7d54d1b8f2506f18dffc0bb9af70a6d2d46ac9db052102c. 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/QZ2K31700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fe20328ad1e6ef3d9ed008e27faee02abd0468d5deff87b3f3102f33842be1. 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/QZ2K31700012.