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 0xc061efb25ca5dc0b658973b24bc19934d3d82e04353a065465b5ddf3fb0c8dd6. 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/b431a920-510c-45fd-baeb-e810f49402e3.json and https://artists.proofprofile.net/proofs/artist/b431a920-510c-45fd-baeb-e810f49402e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x91a843ef6a8594154ca5033cd41a3f7f5079da2022cbd303e6e7e235b98a1cca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2306113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3a7955f9f771f8cec4404f2af07372652e2cb37c707f8367ba4714cc89bca. 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/GB8KE2154061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43536759f5cae1a4ceecd87827ecf253a6f6eec0cae062295d23146266c72a8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GB8KE2154067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a7f17a59aa3fe682b5f310a5862774950b5f1127df95363b3772415952c77c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GB8KE2154066.
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 0xd95d83c4da14ca4566885c40fe25ce117c7ba0a5b2f3a9932a99de725568ba6d. 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/US38Y2306051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95800e6a6aa2c8a0da18f984cef79cd73f31af4aff6b81eb473f58ea31c5d0f2. 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/GBRD52300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ce361208c5c862860cab3ba938d68ed5b1aaa54dc0ee853223438529bae37. 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/GB8KE2304956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b381f142802d7f83d46821c097f7d543847a9c58f12059f6f63e2c72bf143. 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/GB8KE2204745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d1b49015fbf8a12efdb0b066a1e20d22d53db6228d35c3fc770b12e33bbf6. 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/GB8KE1857436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22953ba19662dc84d518328f93ff067cd012093edb0d78d3b52fc6b686dd017. 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/GB8KE2162333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53a1673b728410f3e557ec4a9f826f366f456428a8a7376e9cb4a9e13eb8e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2162610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7266ac377ae082f1e41f7d6572094fc909ba57e81ad77a4c7436ce56847a3e04. 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/GB8KE2054487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1939c11e9e5ed9ff2067b56528ec933c2f37db9a2c0457def5f05763ddc9a195. 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/GB8KE2053453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b4e328db7d75a7107cdd4bfdcf444a993a1c7cbf24f2dc026f4e1e8e76cfc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2053454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2849e23693a71ea67577b418ec2f43356b55c4d300d6e276882d04e0056eaa18. 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/GB8KE2051262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff8a87d1d60407fee0117e1c431c317503fc071488950aaac9d4d4d5f0f862a. 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/GB8KE1956730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7116bad4b57eef544270faad4eba7c9fd24ebe3e1ee64e08b84f675658c4a. 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/GB8KE1955778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8d8d66b4ddc5647500f208d51655a3826b8d461dd46d60a77442bab3a21c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB8KE1955776.