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 0x4a0f9ad1da03df3580e51fb8ce75a42dea4dde98331ac5f16eaa89e2ce6bf17c. 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/ad7e3369-5edc-4c6b-852c-ce200f2a9230.json and https://artists.proofprofile.net/proofs/artist/ad7e3369-5edc-4c6b-852c-ce200f2a9230.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 0x8c97fef590d2bef78c9165e6f4c3f7eca84e3e2e7054317182ffd12d118f4a57. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEM1949751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ced41418359ff35466b136dc27ddff15cc1ff53df8123829d0cfa2909c9e53. 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/TCAEP1900450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162a58a375d66575f92ff439f2f47fb1a2b1ac833c5a5d24937b4302ab5c241c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:27:32Z), 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/TCAEP1900452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dff31229527f2b769264554d57a06fcf075a782b3eabc383b39deb9138c224. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEP1900552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b41d9d10519a32f2087e05c292d498152864244a5efeae97b2605218743717b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFB2077994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3bccf655bbc5ceac53354a6ecbec0cdddfc033abd8e3af49fbc14e430c02b3. 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/TCAFS2173971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffb11a78045aa8f084592872080d8fd089f65616e42b887e07c52fade495768. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAGN2230893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa2f8a7c3beb8483e65beaa552715131005f387f4ccf17f142e44cfed714db. 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/TCAGN2230835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86be359e2fd14b203b253e51dacc8878a8d1a37110eb56c894ea73e21040a35. 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/TCAGN2230926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ee711c6ea54f62490259763daba6297010d5edc665e6f78589202c6d27d77. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAGS2228381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5a31618f00b7298a17431557e8bad2ae752253732684401f2d296fe1809d85. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USJ3V2383813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cd32dc6447dabe512a5b7d1fad29e17560f82be9d84c0de77f2cfd770144c3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAHN2331445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f951afcf2775a1ccf2d346d28936171a6d028ce7407e96bccb8a02511551a44. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJF2565436.