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 0xf1589a9045c9e1b81c74916f7d9aade35ed3961900004e8a63744e430f6655ed. 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/ef5a9e81-94c9-47a4-a55c-cde13cef052f.json and https://artists.proofprofile.net/proofs/artist/ef5a9e81-94c9-47a4-a55c-cde13cef052f.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 0x4907d8e50cd62dfd4b329a53263cc331cf49de0ca8c42f6f291b63db8afc5f1a. 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/BCSOR2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc68e45be0551e10d6b59474802e2a5922b35d3904de051984fea2633f9de81e. 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/BCSOR2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7456628059c68cded80c2d3ed63b5f8705771b816ee817f1b2dddb502bfa6f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:28Z), 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/BCSOR2100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf4c7761da6b96f7406a0f575f96148b5f2b28c89974e2e1a1c54a466aef6a6. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BCSOR2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf4605f09e543435623e7de22eea80bf7cfb25b92cb7ad7b7da1a10aea3ca35. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:08:36Z), 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/BCSOR2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af9af4d78f09ff3e0c4dc20d8ad803130a2f9e2b3d9cd68bd452164e31562d6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:40Z), 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/BCSOR2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4418f5312e5542ec28696ebde26e3eb3e0dbebd7df4bcb89a3af62bad06ffb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCSOR2300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a3414f9b67eb403e4b58bbc48f877821972f11d28d5763133472b5c0be9205. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCSOR2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b50ed8412d8de5b9069f22ac3341692c6d72338adf788701c54063b93b0a06a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCSOR2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42272c6e81cdf50985bf87de5552cdf1849061a0f1e8c88cb85e84eb8329815. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSOR2500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1ea3de31ca8595345f18a6d12bab85edac38794e29fb9954dd20482d696a96. 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/BCSOR2500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77570c27db0adefac64346e99ffdc64dc58acce5a58d7b72c47459c36c195996. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCSOR2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2eb9423dce840247ec94ba32e201e21e110c08df57a0c818f6ea32dbd7b15e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCSOR2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c9488aeb5075f7bb614d1f5e22a4dd4ff6505d396358855aee7d3079eb9cd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSOR2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a960e0f15500e70558d8401fc4d3756bde46472bfdd2fd3b2c9e76a34baae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSOR2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33957eaaac6aea76c068e9321d858d025745f923d0c7c3a4905a6b3295a356d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSOR2500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc275b922719acde790706f60ca1b981eb8f33d7d749221af229d40809ab13762. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB2500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa307a9e462654c950f61dfa294a1b08fc76514569186f7855e0ed0afcba14d70. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX7P32300386.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185da4a89ef346d5ca49f2bec94c48baf12c9a0d88c7ae839af70f52c99c3944. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCSOR2500005.