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 0x7a9209ae4178087e2ec17d252edb6ffbffb91ce1b9a14cffa557647d9675129e. 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/f353e008-0476-443d-a95e-3f77bc8f634e.json and https://artists.proofprofile.net/proofs/artist/f353e008-0476-443d-a95e-3f77bc8f634e.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 0x98e79d1c4bf6ee58999adb1c6cc7b5e017941e3979f0a0015e830cd1f1c3722f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHNA2505385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a6dbf4602fa6a517bd44affb8af9c63e4cde75a6a299c89761eae1d144507. 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/QZHNA2505386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0505d780f81000e94d8e9b8f8619699daa49038682289415b91ea11b91ee63. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAZ2526966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136c4d22a410c0a468f8028bb781445d0eafa86d73eea613de670bad0931155f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:47Z), 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/QZTAZ2526967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefab8c00381883495ff8f23692b1add0e69d175396e259c8279c02ad9c35c22b. 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/QZTAZ2526968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e20e89618b9d16de333d665e51fe85ea43acf920939efe33d1ddd3b23f1924. 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/QZTAZ2526969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45d3cb18f1e357ee3ec841abf5615b078859dfb782306fc967a6549c0464ade. 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/QZTAZ2526970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45064b7100e672aaab42ad3df11aae3b2209ca97656ff6123aade48c752c2f95. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAZ2555425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b41e51ec3c73d32eb63067f9c626e76d5b0982d555abd6270ed78f6a52084. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:59Z), 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/QZTAZ2555427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6813afc6c1b743a429771309ff0db0801276f85cbf9b0b14376efddc48fa70. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAZ2555428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4511eeeadaf88ad50006320bdaf9285b147519f59153c9c83877708357f75a6e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAZ2555429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f059ad4820e3111d58133bcca234c2ab9d34c1f89a643b0838c3e32825668aa. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAZ2555431.