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 0x5b6c03a63d8a3e0195328474380291b433decaee32e06c1e707ef01500e98a9e. 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/0e299487-c5f0-4312-8efe-84762d7e393c.json and https://artists.proofprofile.net/proofs/artist/0e299487-c5f0-4312-8efe-84762d7e393c.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 0x995d444e746f5bd953c7b63e55bea047e00be17a018c794ffc4467254da109ec. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPT2267542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef25fba9d70d6f6b7aceca7bfcaa3442b91b3473efb29b021888d6bb257cc36. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCJPW2357386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562cd6be877c23ded5f2bdfef6f265464ef7aa5574d5af540a7db9d32c1ee8b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/JPPC02413439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c4c9bdf36bf159f22207b14e74a4e66ebe96818339de6c5da138833b2c2c47. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPPC02413684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d87f6cf9476ed16a5fc34280adecdb94cff525ce952caf05e49011ffbbcd7c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/JPPC02510140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a3952a9ae4ad016e6078514d5239e500e859786976116fe86bd2bc09c517b3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPPC02510141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1208592568ce179de56d31153b42fa12833ee74732b3faa32d28acd03733696. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPPC02510150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46f7c5ceed5d95d473baedd678f07f85eba35746ca1bc9f56f0a86a6641dc86. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPPC02413904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c4c9bdf36bf159f22207b14e74a4e66ebe96818339de6c5da138833b2c2c47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPC02413684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7005df35356e3ad7d9b2356bcb47f7d7a526225c174d61db207b8b5c7833cb33. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JPPC02413905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229c3e82c1f62289f5b5999a224616a91222def1e7b011214b92d7d53b697b31. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPPC02511595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229c3e82c1f62289f5b5999a224616a91222def1e7b011214b92d7d53b697b31. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPPC02511595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13766c377ad69e50b5e98903c0f0e27ecf1213db81ac608094bf13f179f2003d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPPC02512609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0112f1a7fc5c6ced8174fb9d62f28ac6ab414e20ed2706516e46c5690840688. 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/JPPC02210033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5615b9752ebd8d5e7b73157d2061daa3d86b7536487b0c3573ae9117b8e993c. 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/JPPC02210026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5615b9752ebd8d5e7b73157d2061daa3d86b7536487b0c3573ae9117b8e993c. 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/JPPC02210026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839204b1c5b0f697859ed46433b3a5bc216f633a983eb6b2725f1bce7a8573c4. 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/TCJPO2161532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2b612db21c073b0428561a6c4bf0f457b2f0b94a4bb927b6e95ac7e3bdb480. 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/TCJPC2464040.