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 0x4281356bdbe4b1b2bcd0e717376dbce30698bbad87302c5c41d334db969ece3f. 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/0682b17a-5238-409a-95f1-d89f35f4a800.json and https://artists.proofprofile.net/proofs/artist/0682b17a-5238-409a-95f1-d89f35f4a800.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 0xc81fb377917f0a4fb4c09ba4e77f7bb9fdb94de525841a758ce91cff05cde0e4. 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/CAWHO2027773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a0dfd27a070f6c80271766f154484e0ed8a7a1563a35d131c12d05555473e. 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/CAWHO2027774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f396d94a875750e7e6fffd4a02005bc2da8733aeebd684e715f6b1626831ece. 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/CAWHO2027775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac327708cc4acc03c7428d00dce614d05611d7e34fb20a367ffdcfd36ee51b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAWHO2027776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7d16b1003bf1b908cf66f0ebcf3d3cff6b8506c4d23bfb725ce1b79de9e883. 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/CAWHO2027777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c66d2e99cc8775bf9bc1c5729dfc6e6c06e0b464355babf433713422ebafa94. 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/CAWHO2027778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08470eaefd2d255f9440f02f9ba62002e0417340465ad6bf6e3c23632e6715fc. 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/CAWHO2027779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dcd05578820c315c92fd25cf96022b9e0e30e61c524e47ff2870aa2a5d6da1. 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/CAWHO2027780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b2046721e05d711f906f778d45cec9445685544cd5400c31c6073f88ef434. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAWHO2027781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3980c22c2de668a69a050721afb31b35557729a6f5d84cd1278c30079c8edf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAWHO2027782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe64dba836f5a284012a06e5d276d4ff6611e37d5efd1a9512868bfa66dd6dee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAWHO2027783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4365e7d2de30ac02061001ad865af1cb4b096e32157dae5ea063663aef847a. 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/CAWHO2027784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf021100c2229a78350c0bfd04bcd66576edc71729a77a30ff2af4c3c269e626e. 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/CAWHO2028997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50cdbd16d632af82c627782458ebc17002a8177d1c20bb75cb1e5d8c1d6950e. 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/CAWHO2028998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc877d212b6359c393403ffd9cec46c0997e053ce55c00f4e4132d458e61dea. 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/CAWHO2028999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08fc811ed0e5ecddc7cc8fbd6df9c6378f1643bd98005f3f774df3b5c6771dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAWHO2029000.