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 0x5ada5e51b93a0a5ccaa4bc9e6e463226122fcae4d8bf9451d8a150334b742dca. 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/bbde52c2-b178-47b0-ab69-f9ce4f467fa1.json and https://artists.proofprofile.net/proofs/artist/bbde52c2-b178-47b0-ab69-f9ce4f467fa1.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 0x53b369a1f50c46eb364490e4ca90d155ddde0b3b379bdb73ace59b0dd38ce0b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ8LD1768515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1fec1fdc3836f7e3cd631aa28bd3763cdfc1aee28d515ebc6cf971f7df28e7. 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/QZDA82062325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b6b76caede9875a09f2d3cee6d05c4d0bc5e5cab636c1c17f53d6049816a1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2257736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc01bf5bde68fbd6785511182c8ed420afc4130723ef2534fe4cd9326d6e9134. 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/FRX282192642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6caa32f4deedd91cf325c378f245e3f3280dbb104f8eae7a83ff9d2dfb7a5f9. 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/USA2P2339534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6caa32f4deedd91cf325c378f245e3f3280dbb104f8eae7a83ff9d2dfb7a5f9. 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/USA2P2339534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53993e786bbad258c487b2acf16235b5cdaa0f0456a08d6cae82be485f05f6dd. 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/NLRD52257476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53993e786bbad258c487b2acf16235b5cdaa0f0456a08d6cae82be485f05f6dd. 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/NLRD52257476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1462aa00d1cf14436d89fa95fd486a327e41d9c9116420d566df24df0408efb3. 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/USA2P2349158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5353ffa08a5bb345ad02297c5c02fca4641ea7669ea775d0bd612c33004120ef. 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/QZMEQ2428506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c7d6742a2d08c45171adecbdec8d617ee7d858228ad973f34d9d065fe2a68. 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/QZWFK2367063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fecd45abd5ef67edb82a5bc0c5f9e39212ae935b9918c3f4cb46f160cdeab65. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAS2279793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e203d07bf6554b9f91a9c5122d92d78facfabcb39fc489eea3b4f0a976e764c. 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/QZHN52255341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898c4fd276acd0a8122230c457ad1d3139a6e98397bd7fcf1dd4ea0bcfadbbf. 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/QZNWT2161497.