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 0x7b1c9bb502d140226906d7e57c38c0ab80e235ae22a1f780c22d60f1ddee2ddf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b319b64-189b-4536-a7a3-daaf7d54ab93.json and https://artists.proofprofile.net/proofs/artist/7b319b64-189b-4536-a7a3-daaf7d54ab93.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 0x299364494ebf940e88d6dde38ece56ae9320d00690f5318017f2326d24a3f0b4. 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/ROROT2009201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a55d2607e1bccc9980be284aaa179f27b7d71c9ba8f66dee7190268d64bb208. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ROROT2118101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce2ef98885478cd8f942127110ca75a14df3b6d0310a0eb69c25c981789544a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ROROT2118201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf699f5881dddf3bbb0709a5344a2c0d1a3e708c4bad0f5a4687ca32b5c3fe. 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/ROROT2118401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0032a473ac27f1e18e406846485eb1faca6b9f34fb63b74747040b41948fd89. 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/ROROT2118301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08655022019f401aca949ce962fa7edd055768e74ed602a59980d1cf7570a8b6. 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/ROROT2118501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22c59765fbcff0837e81bbfae5fc60d8c1a4b6c5c5755b1c9771921cf98bf88. 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/ROROT2118601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dd33506757631dbace5587730ffa4b23b5c0cb304a760f7552cc824e234244. 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/ROROT2118701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a3d4746268f1ff230b3f8b15058f5d4eb9e0d351e0705e355932118949eff1. 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/ROROT2118801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781214ea6e35814723d0fb37ac0af31ba3cc06aa51624c62632e194421b03b8. 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/ROROT2119001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4c5a828537f648a5affda47b781b9032c3439b64de8cf635b6cf9f6ed9e8b. 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/ROROT2119101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2bfc0494e513864c78422345df2f0e71bd9578539a11a89411b44adba008d5. 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/ROROT2119201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299364494ebf940e88d6dde38ece56ae9320d00690f5318017f2326d24a3f0b4. 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/ROROT2009201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd62afd38efb6bed9bed7249fa227167292e3093e4a358f1035a5175c12b6a4. 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/ROROT2119301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a35d2abeb64adfd95600c9543c2cb8c43720746b74b93132f3b7819ef3f6941. 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/ROROT2119401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c52293b41402888a4f6a68f870e73f00678d7d9404d0caaa1ab3c318ffbdf1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ROROT2119501.