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 0x023488efdd5604a1e442b02062adc4c3a6296ff45dd327d4e6c837679cd5d50d. 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/2cad5e19-f0a1-40fe-af00-e79483a345d5.json and https://artists.proofprofile.net/proofs/artist/2cad5e19-f0a1-40fe-af00-e79483a345d5.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 0xe68101894e705609a62d42e9ea67b9f52c398709b7b8e1265316798a43139655. 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/TCAFT2163274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46672154fe252ea27e91a8a3a02df6a84458140968a15488e1b9d9c2455f36ea. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:26Z), 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/TCAFO2181874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196265ec6d9e0c4a515a6687886350b0853ac2874df0e1dce787cc1dab60242. 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/TCAGJ2217105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fd709076d74157d780b307738edf6b67281f3f05c980146f162f1993f6dc4b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAGR2244195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301f3204b45a7509bcd6ac604e81733dbbe5f3c207cca4b5bf8a19ac7933b5d8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:19Z), 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/TCAGU2380591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d76f8441bd6bd13ef6a99e869f4f32e7ee9297ac2e47389695f6652367cdc96. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TCAHF2357711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5312ab9872d89975d971e5849c0fe387ac2b13100347fc5cede9bb21eaa189b1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:57Z), 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/TCAHO2322671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd66f2284d64dc20595546187e17e9718803d8d9587c7cf05b310525e7f559. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAHP2343161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcfc27f6ebe29e6c2ab2eb361c04492b06312ef9b18b3780ddf42bca46d4897. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:34:46Z), 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/TCAHY2434627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f10e98c37bdba3adf6623baf5d1277e1a13381d24d5bfd75d307eb4e8bc2e2c. 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/TCAIK2462922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd2db6abeaf5abd43010917849e9a9e3ebdccedc0ecd71037127bfbc24a8063. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJA2415511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b9969befbe1128def35bdeb06a33302298b7370d9debfb4b2ff3ab8f262407. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TCAJB2493452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0348cd118292e86d0af30ed3795a54671cff1319a62afac22f3d2d4c1d82ff5d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:58Z), 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/TCAJC2482137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c05be7977f46cbfd3446737d058e37a278d1950e41f6fd90a66dd6a308ba6ba. 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/TCAJE2538845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c0705197e9b042f9c9faf316ce25041650603d485675709fd561839384624. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:36Z), 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/TCAJM2580079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ae1f11301eef89c4bba8603aa4ee156ba3de6d247e05cd71bbf2c9a12a6e4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:51:23Z), 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/TCAJR2539651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526e4cd73bbabf0cecb86e6a6488cd9ae1c2ae15d5dfdfcce9ac94d2f55edc6b. 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/TCAJR2539859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481fae33b549044afc8238cf54ab79f85aeb2f67aea3adeb4dbe90392ee61c5b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT65X2508219.