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 0xcec048872a44ca0459eac66a26056c1dcf97e8ac6d48c80484c573c92cdef809. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05fb9cc7-6fa0-49dc-8b7c-bee30f4fa180.json and https://artists.proofprofile.net/proofs/artist/05fb9cc7-6fa0-49dc-8b7c-bee30f4fa180.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 0x7c69bfedf0c481f1567b91ad74f3a009d0cdf45243c6936cbbef5bd5a51247d0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:40:21Z), 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/TCADF1766287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5680e273359a961a0a03ad882f4cc49d38c1cc4e4d76f2ea58eab9393eeeac64. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/TCADF1766297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180441737d298a4ecaaf1571b0c52ab19fc11f4bec15147c51d2b9bb1b9d406f. 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/TCADF1766606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13abb4f4ed0f05972681931f3cd0c94bbef347eb523f2199a8929131a7b0825. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCADF1766610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1924415d6a105ca20ef8f2976f80d34e3c28d8bbd183b14f57b028a0e1abc8d2. 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/TCADF1766611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d76021e5d30618fa41d4e536551703e73fd0a66b71d4fee2e231971de10fe53. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:23:36Z), 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/TCADF1766613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e931e3ad7e26bb1b5a590dea93ddbb5f1afcb9e6f6670d575db03e880113559. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/TCADF1766753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ded47fe6f1c04a80b95a63504a243ec234be94620f351695d69be99e9a51e6d. 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/TCAEX2061403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be8ce55bd8b5cbffdb76719feaeb8ca9a535fdc14857bf9589f6fb2f97ebad. 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/TCAEX2061405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de8be329b0a813bf2a96a359579b598baea19eff26503763a5a6f1822ef1af. 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/TCAEX2061408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacee10d2ba32ce4e5cfd3c792b6520cc66340bc11235ffd3e2276f4e6a5a3f5. 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/TCAEX2061432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75e65d7553514afc83ed655a04cfa16d511eb5701d74c5be65b4af84f619e15. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:12Z), 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/TCAEX2061442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837bb91ebc48d4cb211c7054db08c28f1f061571c9096521a0199e6c8c6985d3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXBAV2105536.