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 0xaf00d8430b7931caba07c340492a62c10c71ae92fd9a31bface5aeaf48cd66e0. 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/adc6d528-b1b3-4c39-9f8d-4de2b77412f5.json and https://artists.proofprofile.net/proofs/artist/adc6d528-b1b3-4c39-9f8d-4de2b77412f5.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 0xd9c0660f07bf57a8dcb16a937398b766c14d18b736a195d6a28134803a1fee26. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARIXB2401533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf59539aa604fa84d3a99f3379d02dadc2c74b575d09c2647856bc5a4a79dad. 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/CLKQ21800362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f3e7f0b1ccb08b24adfb04692f5be62daf25a0511875f9aca0c57ae14b425a. 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/ARIXB2402109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc90cd43b486eebcba370859ae2ab1d5f9703aca9c47bb6534a16c82f95a3d08. 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/CLDV42000798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67449e8905b6c13226564edbe34fe9418c9cb0a34f0fb38247d43e482040f31a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLKT21902098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf59539aa604fa84d3a99f3379d02dadc2c74b575d09c2647856bc5a4a79dad. 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/CLKQ21800362.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbcfc0ca0ecf34d251d73c9abbbc2f288c4789e325061994a716f8419f4e971. 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/ARF472100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60d981853fa7b533f96900647c5761df3f333287e482f0e7c9d78dfc85959a. 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/ES71G1742943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebab09262146e6d578a3fd91289a74fdc15be2a95873bba2ea72f093c9402e0. 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/ES71G1742944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f04e733e0d3b111ecfc2683b0b3f3517705c91cf5c2c1a12c4d96e3c2867c8f. 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/ES71G1739354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945639fa688e775b52ab70be757aadc35118e02e6866ca683efa034ce26e692a. 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/ES71G1742946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80b9be315a635043cdb4e03033dd1944dac40c0558ac836553f0ac3a25e878. 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/ES71G1736238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f72892d7eba0655ae3f1a27a4e3e1b027b1dbff0995a8d2e8857a31561661b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLCZ21601912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8119fb979bac966f729fba1fc4791f05f52b3532152170abbd106272abfe56. 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/ES71G1742949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221f7fc1250287ee7bdfd0fbb6fb598d834c4620650c7b811827e973fbccd93. 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/ES71G1737551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad436221c4d937d8543c7ed4d591373ddcdf18803c0ac870c5b63a08b235f639. 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/ES71G1742951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac7e6fa5a07b2c92186f1d09b252b261098c4985f7b058d418c2125f03a85b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G1738632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1008638ccadd700a0624253b04327e009af2d30401894d411ec8d2a4c0e1f0f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G1742953.