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 0x8c6041651f018714371cb2e046e48e98d456da2a55c06580375c93867983923f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be1bdfb4-4255-4cfe-840f-8e8f16f4f80b.json and https://artists.proofprofile.net/proofs/artist/be1bdfb4-4255-4cfe-840f-8e8f16f4f80b.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 0xe4b55b2d5be3850ce44f571ea3b48305742b0e236b798d80a3e9a3bf4e8a534e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:32:44Z), 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/FRX872113326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0538d1ab769f0898750df69ae7876ec2fd051ac824f729ed20ec3a4e3cea1c0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FRX872126924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7292614109a156c901fb96b6ca73e114d3bc3032d5f6cf37ade393b03002d4ec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:18Z), 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/FRX872126925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfea48d881dc445abfcc564bb34dea1e9a86cc115d64577c038eef014c5ff7bb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX872126926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9255e238bfbd1417da55c827bf67b75713787cd799d0897f307a100d36d17372. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FRX872126927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aa6c24f774c110366dbc9de50d5c1fbce043a32b60b6718ddbfcae2f73212b. 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/FRX872126929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af24fc56d0053ccbcb24e6271555d2a477e00578e6b9fa7ad55221a498dd752. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:31Z), 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/FRX872126936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df995b3c00e3367c8219922e281e5fafc04430c33bc9bd9a20476be33894b5f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHZ42031394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b55b2d5be3850ce44f571ea3b48305742b0e236b798d80a3e9a3bf4e8a534e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRX872113326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7828ca24973391b9a2f461a509fd1b330492a1a2e162b3d6320684817c16a680. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/FR10S2489428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051a12e67b885437b6a3cc0835b3158b08d5bd8e664450ce27d30361dea2e74a. 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/UKEX32505116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb952c6c4ea659bdfe0f77d54bbeda352ba77f203b6ab0d693ea3c7cf8b921dba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/UKEX32505117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396cb05da16cadff3e2991d8d697c56188798411dda41649f4fb141667912b80. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKEX32505118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66250c135cdd2af154e943d7b57481210d896a5e25ed3a02866ed6b11555078. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKEX32505119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d97884641c0045058b6794568d2e248a6cee2895383d8198f0f1ed5cb526405. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKEX32505122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26266595dedc05b5af0c40849833f5bae124fd058079be569046eb51d174312. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/UKEX32505126.