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 0x20f2bdf5c38a15bb7b2ffb3b48e7a3f39e68e39726916555449f09842e88391a. 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/e15c3998-8efa-4e7b-bb5b-58d76e7877ba.json and https://artists.proofprofile.net/proofs/artist/e15c3998-8efa-4e7b-bb5b-58d76e7877ba.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0122a753a646e36c34e2f009021b1ce42cfa4b7c3a34fefd55f0f930dd4037ff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ31950692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa410e153b51f8ccbe81798a59334f4ffdfc96cec815ab79b3809c85374d8ad. 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/QZHN91917839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d684ebad5e9e0f940f182467130b68a0742aae9363bc975af29d54c1de997d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6Q1968911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba14c34d13a535ccf3388c4f3734577910e3f298cea7e19a27ef6b446e482cc. 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/QZFYZ2049280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd58685feaa2114cfa6616648550178a5f152d2fc8114186eb099ec624161f87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYZ2049281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd646991d083eaab7d45032eaba2efd9ef2ae6f44edc972c93084c4864ee1a. 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/QZFYZ2049282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c09458f3c28cbcf459bcecc38962386ad58d9f22db215f4baf64c02eb049c2. 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/QZFYZ2049283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0122a753a646e36c34e2f009021b1ce42cfa4b7c3a34fefd55f0f930dd4037ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ31950692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa410e153b51f8ccbe81798a59334f4ffdfc96cec815ab79b3809c85374d8ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN91917839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a2fa5d5def0ce0c0fbcda43abc330f87a1c108e8d9da15880df88aae49c1b7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA82186499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76c8e8bbca90ddcf02e4e13e6c27c47eebc6bad047727c14d60154753ad4886. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZDA82186501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae89235e30a7ffac5606dfc271fb111a9af2660352ae46f93af8a1b1ade874f0. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:34Z), 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/QZDA82186502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aebfa39e7c4e37c3ec9262a7ebebc5a0b6d6b3fe410e60f293812beb28e0ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA82186503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115eddaf3d046ba5b7cb8d4fb21b09ab2fea3ee375ece590b7cc6e8462b3277c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZDA82186505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa128e7ccf44f9f9db8f6cbfdcfc2a9d43ef37b2b4a2374f65c531a8f783986ec. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES92335960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa4d7f0a12f5ae6c30ea458ee54b66811a0db1f90a6b1e840e14c95c0604e86. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB22370881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a738ed72db7f1df52cb9efe17e36ccaa6a6fce542fee14d41a29b2a1cdb869. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTBC2307731.