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 0x4c769a12f5079dcef4d6bcb4bf07c88f3b102499c9353618721962f095593fcf. 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/24ac07f1-bfde-4a3a-bc1a-5d2e1f6846bc.json and https://artists.proofprofile.net/proofs/artist/24ac07f1-bfde-4a3a-bc1a-5d2e1f6846bc.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 0x3139e6c2e1e50d6d3f951227d3074ff6ef094590f6ad38e75a7c5040dc6bcbbf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6SA2482645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d192cfc96816774047f40c273e45b74e11b265f27620fe0d31e210989c1d94b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE5BU2503734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d100768d44702b4a93998f36453dbf0f30e1419b0ab7ed2f602d0e458cd0c7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE5BU2503735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c1d0645c5de6fe186540ba7a73b127f355b918251e6144a0ecfd0eb798b7f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SE5BU2503736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd2257aab82ad07683824a80135df2c8579bf3dfcde994a9b76d9a4c94fc31. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5BU2503737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fee474d33d9e0b30bb8225d036a5ba13c6b7f0141194ed0f5e0a42fa66a75d. 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/SE5BU2503738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d154f244c65ed6bc17b0d96e0e533cc2b378052cb225eab848dc1cccbbf0766. 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/SE5BU2503743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3fc2cb604a41fd79c6cd37651f97f7a64392e18166b412cffe9f446c3b90b0. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ATBK71202593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde527ccafef748cb85595d1209eda3b4e26ae9eb32bd20d369016c9e1196e78d. 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/AT1962500394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c492d8f0dd3874d9ab19848deb683eb7c973c605ba6bccd13cb82082f70aa2f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AT1962500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcb6e7cdcff181ce40f98209d34501f974fc08c39bf14312977aee87af81182. 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/AT1962500396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b95b2cf32f4d19ee8f15230e596b4f8dd569a90792e7be24bfdc653ba32651. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/AT1962500397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427a560f87bb7b70d3c1d2d70a8702f47c04929e577394473b43d43e6f68bfd4. 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/AT1962502180.