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 0x251a869c87c0fa7ecef148176dace63fc30d06d2f81752ce28eae174fec99139. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12b00485-5e0d-4fbf-9f0f-df10250aab4b.json and https://artists.proofprofile.net/proofs/artist/12b00485-5e0d-4fbf-9f0f-df10250aab4b.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 0x7703aacc33fdc544f86fcde994650f550fddd61f26a5a2b284cee98ede804639. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTAS2489479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62077e0b832e95fd837293e0a2f987ed2c88f8010eeadef9c7d833d5b41a1806. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTAS2477283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe637ac0602c6a8f264f5b30ac08a0e4994cf6184bd3334c736acaae04c9406. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTB92443843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0961f63418d67249891e954ffe6441cb6de92411d773ced7c5e29584d245acac. 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/QZTB92443852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c56f84b697187c5d0dcd995eb12480e6b7d0c59a2ba2ec6a2b27b4a2bc8df. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWFM2489152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6f284ef2308ae5d22a5cc75a7ef7a1125739c7593ee2edbdc975bcf8f4c47c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZWFW2488997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e69b2d8efd3d460447bb7cfd170af2dd551559bc4f3fa5809f0a7943c98be8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:52Z), 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/QZWFW2489001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdc8d17fd2fd417e811b5bc717c87cc662132faa3fa972ab74dfebc9cbde45c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFW2489002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cd4685729923f3dd696f470139d8b3464aae1c967dc676759da75fe233ad32. 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/QZWFM2489154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dd3189f8b5fc9654c565fd64cb5f5974f53cc25d342131480deb684965d227. 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/QZWFM2489156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6812ffa814aec0efe2eac502bba20175c5dad85c7e8b36ee24be72a9dd696cb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFM2489169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a3eafa6d264e973a7440bf935c442d086c8ee9d996fe3a59ec9956eb763c0e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:06Z), 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/QZWFM2489170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c4949945e266e8c4bb89928bbeb8b141b47685ce36180ea5f381d0fcb3ef5a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWY2586638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ebd0752d08e9ffefbcf87900e9e35642a410df393254515ca871591c25309e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB52532632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af7c9a1b0d6ad540a367c46397443e5df43315439c7bf81fc3a0e5928a037ce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB52532633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaec80d6e5c92af27172b117ff5578e3294babc4d9df6b171c6f6bca15ff56e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB52532634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e5dab0faf6164042c19363f6b331b6565a46e67299e144fc9d130d556ec6d1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBB2550801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee1896c015f9582f0069c58530d3af03d9183b77b38ccf5b9539255d3c5045e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBB2550802.