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 0x7f0394c27e06d1b91f1967626819ee26b440ede054c59d128a75af86b151f3c9. 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/d57b66d2-080b-4d6c-944e-1e734ee11975.json and https://artists.proofprofile.net/proofs/artist/d57b66d2-080b-4d6c-944e-1e734ee11975.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 0x20f42b1e84adf33251b8f282a4593f137ba7f5c2ee41714f1e9af71f661ad64e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:48Z), 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/QZMHN2010678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88727addc2a7d50b61fd59099b7f56342407038ee6ebd53c3db897624ed00b65. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:56Z), 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/QM42K2164475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c1bc06481dc947f3e0b60842532aa2e0936cf8a56ce5fefdc9af5347fcecf3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NL1ZN2201885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d64eacb061ee875592da71b54570bfd0046062ec5a67edaf571da51d171025. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH7812355602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1556424852ea97c44a0409b8fcfa625e08946c25bb521423d845def25b810443. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/CH7812356357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560e3a8baf8bc72157e5deff0ecee477cadda386ed013133d662e714bacb0a6e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:59Z), 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/QZTBA2329702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f4e0ad659bc2225f8fe82721adbeb9e5d899abff803767dbde24f6bfe4700. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFN2306618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bf905267587390c189d7f5177db4a63dce5115e542bbda41c3164bbb75ffb0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH7812403392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8b41c0613d51e6664204cd7a3b369e0c8fb0d5847a70ea1d9a3d2c17ea2b45. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0S2430583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377b1e23fd8c5f9f12ea58ac8304822936372c896b4d17b281dda4d63539fbc1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:44:52Z), 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/FR2X42536106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f5fbb75fb24e6f2e4df3ddbd071ec1082bdf94b33a38b44a48739f742af634. 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/QZMEN2271694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afa5c775ebaae3bc18b478d42263ff2799d53cc08b2bdca4cc775370b56589d. 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/QZTAT2597432.