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 0xd70a00834869a22e72430cf38edeabe6b6d16c5daa99dbfabdafca4026ac2ae7. 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/9b543ee3-d594-43b2-84f1-1e454b818670.json and https://artists.proofprofile.net/proofs/artist/9b543ee3-d594-43b2-84f1-1e454b818670.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 0x66a58a3f1a98530316a3c24cd2f8c5d61735f2004c8cc222f9bf456aa2fc22be. 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/QZFYW2031702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295bc2eaf923d29626aba926babdbdc53eb31aa4fc624da0923d82c6f8207185. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:00:45Z), 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/QZDA62016256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c10c98a8427689a2a9ebb0fa7d29b979972d8eb9edcebc032fe68b9b60b500. 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/QZDA62016260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed1c657ec117952da17a23a4a174516ffa40a846dcda9b20f999b3088a00d2d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:38:57Z), 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/QZMEM2035501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb840bbf7721cb78fa80028bb8718dc3ef8b229f7558007d46aa1a7d5581bb70. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCACH1539279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db90037c885368ee7365bff9e11d3ff00ddf1fae9034c2f63bf00b10adfbe9e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCADJ1738040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b28f3fc5bbc9c6cb87440187b2093f79de43c678ba774a4a9d558b02ac098e6. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZQAY2161018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba6d5a8934e748040a321935f843c70653e3cbaa0b36976fbe6a20d66d670a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZS7J2149485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6a3ec97f27e3e9149405b5d7b22a0b07e08f85e6f28ab474f077dfb7a2348. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZAKB2154498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc580e5a7fe69552c9af6bee64927173925a2f7782980b6986a87b4d33071dfd4. 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/QZAKB2156510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c160d4ad357253daf722a0f295d928da6868486ac1a45f30c8c5064015782d3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZAKB2156512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8385ebc4943fc4130b57bcbdb98bf5a8ae610c9798c11d4142f377bf607a2cc0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:43Z), 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/QZHN42378371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b48104c15882a0b8941dba00fe01241daa186360a455015c87b35a79c76047. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBA2395646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083f12a5da0d936d10689ebd0ab95050c5a7083d20e624e825bf22ce535582b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEQ2464057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1426881b1c5cc49f107f1c4bc997bb9b4c6dd00883fae747154a537afe509a4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNMW2560339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282eb64582ea92c904716ce2ae82d23d09f35d9b3cb776900679892c7be4cbba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2147842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4296c20b87eacf0f7be9cdf0ead13929b4dfbd550d4b0882454d7f8e9be010. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN32019948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2624c910fb56f02b202be2f618057da030ed0443be6d6222669d761a6b95a43f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ72027433.