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 0x49e5dcd41c8248a09eaec16b526e9299216a8c4a6adff7010be7511768eaab4b. 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/1a3115b8-104f-4c1a-a06f-fd4ee5d9474e.json and https://artists.proofprofile.net/proofs/artist/1a3115b8-104f-4c1a-a06f-fd4ee5d9474e.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 0x11085c153b07cd4228630ffa376d531e74c07e7ab81639a74d5c2f0bdca0bfb9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUB282300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58fce9b5044393e2248f5d235bce4a847aedc64ec9dab51d38d2b4c4abafe3e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUB282300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2874a2cbeefa9593453d369f8186783914a8d7edcfe6a9a45e5fd7fb9b3a3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/HUB282300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2df5926cc29925db7e4abb15facb2100271a14809769b97ac07689632ae09d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/HUB282300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338633d7b1d9c22c030180e9d5aa9dfb8197e73f5e9c4babadea87253e5da1b9. 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/HUB282300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2cc66d3ff2a35552c005152a95820ed93e28e5abf76fda09e904150c1878e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/HUB282300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86381c7ce9536a5724c2b13a08705ffd5b0b056c7d7842a2118d202131846e18. 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/HUA831000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc711d6150ee997dfdd0c2ed211cd482169e4696cfe8ecffc779f2958695fd06a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HUA831000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcfc146da40aaa4c6169a6562acee7d61eb9839c5c6e0f784256055937f59ff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA831000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41f10b20c7b75a17c7c4dcf05eaed5b6ea1df1cdb2842d46b8bc6c81ecaa65b. 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/HUA831000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8721076d3a48da3acf9a0db37afbe4e1eb85735e355bd0944966f80b207694fd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:32Z), 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/HUA631200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde26b7f01702f2fa4cc651362cc8684484c3eb25a666c019eedb7d30888877be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HUA631200376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78637c7a4ce632ac55a66084050588f31143fc00ea42fa4c07443648a63c542. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/HUA631200379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f38ad5423db14ceb53289c7356f47bfe308f34da24ffd2ac7b34f33deb90dc9. 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/HUA031600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff05853b50c9e8982fc172d14a5de3156357b6ae2f0d4f8b214202a7d517cdaf. 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/HUA031600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74a9231f84e33042a9581898417d2ec528a209deefbc20c8851fcaffe17696. 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/HUA031600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76397b536c019dcc94559c8a3fb60ae7371d370d014d57530ab97d1c44c39e6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA031600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cd0d8b387b142b5e74c57170e2f084bd9ed8775ace11426990bb6560ac6fe7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUB040601109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8673c42475ab222e05382ef5de9cfafbc68fe1d633ce324c443a36a4d53b9de. 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/TCADR1872523.