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 0xe05c3befaf806acdc2fc06222fcebc0f4323a65f3aeb4251002f9f7f5c38f82a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89e527e8-63e5-4019-92b7-d7fd84730804.json and https://artists.proofprofile.net/proofs/artist/89e527e8-63e5-4019-92b7-d7fd84730804.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 0x0a4d362766948b13066ce3f095aef9e4101717e25bc1523b455a717ce80cbcb7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZN882525119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c3fd748cadb42d0917f793d90d412bf6db7585e97e688cfd72d2bfbb12fc0e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWDW2515919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ef27068df8d909297d4961559054fee2fa52ba3195e470311d73f33b6277e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2381761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfda56d4208e820aec82c2079707ee9789b973dd63315b45591c9d96242e037c. 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/QZWDW2515920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ec6baec0bebd47aab04a59873e97d15519f85d900c2914901d0cf8e721ed0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZWDW2515921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d1ff6ae46c48df5afc6da0e218173efe7f33521a0e909a22e176ffd0055987. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDW2515922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb4f3a4d9f8e5dad7ecc47c86436d780695825fae216394653690e2214f05a2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:31Z), 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/QZWDW2515923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4d362766948b13066ce3f095aef9e4101717e25bc1523b455a717ce80cbcb7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZN882525119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad12440be4bbccc7e100387d9684227b78f509d4d311dbdeedeb10ea98713e53. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWDW2515924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c02ad273c59e55549830865d725a08a1856100ba74f5114a5367f17d25f9b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USL4R2357034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a38c7336295d890e5e8c91a52faa73b90f200682ff373b5e05545641fb1cbf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882570977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cc92b448a14da6a634130ce504904552b343aecd35bf21c23aad29a91f2bea. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZWDW2515925.
POP OFF (with Alex Johnson & The Everyday)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7938f09c870a30048fa42e78171596d4f70c72dbc9cb6c70387502d8f95b3d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDW2538942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12aec0a0c37dce600a3e429d0c749d297c7882198dae8adec076170e4d0c24e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWDW2538943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec8eff2ec7a481d1ef1b051ecaaf9c57c6f52bcdeaa1e1f4e4a259bb53b855d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDW2569723.