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 0x1ecb9c82294051f7d783476f0caf17dacf188f6db22e4a832ab0729ee10fea1e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a78f409-8121-4d5d-a687-2532a4ef11ef.json and https://artists.proofprofile.net/proofs/artist/4a78f409-8121-4d5d-a687-2532a4ef11ef.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 0xcf97ed88e08caa97c90c6ada41b639b212e3a8784da39420225a00bdcf67f946. 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/QM6MZ1882673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943f65349f526ba01125da6c694e3f79d65a60dd620ce3e1d59ce95f1f8b4754. 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/QM6MZ1882674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08bd98888a470285390dec2b450e6bb9970a612ef927d631f86d92dc2416d2. 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/QM6MZ1882675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bdd3c64b8c2ff56e89b075319c206d1fdb753002ecfd2b870850608b6ce506. 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/QM6MZ1882676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8203765008cbb93121e8d78d5cc6b9774386a132be3b60fc8ca925e1fcee001. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QM6MZ1882677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d598b6ab2847ec85b923e3c1cac435f96c57c484e1c0194496d0d039c74e2. 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/QM6MZ1882678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8fe08fafb946c739f901194ad9712ecef7025d74cd1d9dcf24b6e729467cec. 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/QM6MZ1882679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e8bc007c0ee08f8f76d24fef0fa61d5ccc188de31ecee51f47643750ba796d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM6MZ1882680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a5b824805e4f3ab34ae650a772298ff940f0b9efccadc0df8a203251746e40. 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/QM6MZ1882681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5604c431809bcb466a6e8e09fe8215c0b3fed5a1d6b1fcd10e4f1aa35973b3. 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/QM6MZ1882682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e6ae10404b660351f03944822a4820d559ee690640dc3d64a2317b42db9d6. 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/QM6P41502796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4024269d6ade3438860cef59b4a2a8d322c8e1d6ab18e2a0afab23aedbdd9f79. 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/QM6P41502797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284035c9a9bc8b064c4a22f10b0fea0a3d40fb74c36b5bc0d888eeafa2ab0f85. 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/QM6P41502798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7726d86d8ff95cf7a63fb548650c854aacfb24347a52de6b9f6b21aaf0cd61. 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/QM6P41502799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ccdc1c1a88bc4810b99247e2d9ad3d2ee16ab7575f2d174224a5a8f6eebf92. 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/QM6P41502800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14c0111d7eeb3f2d1b7a6620251073697cd6e90b7c9302946854a6305349511. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P41502801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395f9bb4257d1f97426fc5ecf445a194ec0519bbf5acd58a5e24edd9e0de21c1. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QM6P41502802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9249dbb1dc42551d3ce593bbd3275b1aa060974413a012d2e80486a0679310. 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/QM6P41502803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313d971eeffbd811104d53a856c7b3f32f7656acffa4875d17d8b67d5cb7a86. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM6P41502804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627feccab24fac73bc1d7ae9d597d5ccb84269e6ba1284dcdf0cd54a8d9d1615. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL1001085184.