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 0x0dfb5b5ceab0a4cae72baa711c2104bcca98ff33432f3d01605ad3cea21e20cc. 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/42390a7b-1da1-4fb9-b03b-da2c382dd519.json and https://artists.proofprofile.net/proofs/artist/42390a7b-1da1-4fb9-b03b-da2c382dd519.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 0x8d6629b1cab716ce77d4adc62e23b490efc634e76f3e82bea81580687c899d98. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GBKPL2139754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a30a5be6193178a892f02fe34f93064637468821fad49fb1084f79d0bf1cc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:35Z), 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/GBKPL2148833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fbbcb4412dba22d1bf83231c26c67047c83f2d4e57a104fca890e966d3efcb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBKPL2148834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980791dc9651bbb28f7fc980252ec80ccc89f57983aeea4b2d49a9cc2c0d57d8. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBKPL2148832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d3f6b802d212043322ca28d3ddf64d15abb60b9d99a762f707aba35535e1bd. 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/GBKPL2157121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34df6f33f1638e97486a024bde31f52e0be5e8535f2d86c5887856ff465a902d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKPL2278158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2cc5be39a4fcd3734da346bdc5f9e09568408b44992c072c321c6b3c411f4e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBKPL2278156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d34f59bc977a0e5b958c297ca756436b51c52538f048cf4ce03b2d9d583b74. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBKPL2157120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8b7c3e11bf2698f3e988a1a7bbc13edc1ce414e6f58f22ed966890b7477ad. 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/QZPLR2240328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db8524828781709103cfb420750d1d2700d9b788ae03ca383fa75aef888c70. 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/QZFYZ2357847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd885a804a6df1e24a69d120611512f44c664d156b8999d921e8379f780ab1ca4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:08Z), 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/QZFYZ2357844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fd306299f16fe70343b968d0057813649c21da00cd08791c824ade838d62d8. 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/QZFYZ2357845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db8524828781709103cfb420750d1d2700d9b788ae03ca383fa75aef888c70. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2357847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66156923af5ad6143fefd12a2842af6190707bd29648f5b46e00c4ca643b0683. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTBA2359083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66156923af5ad6143fefd12a2842af6190707bd29648f5b46e00c4ca643b0683. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTBA2359083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bcd89036ce4f1d937ec3822f231a1395f70e4ab1342bd6320bb1808137ffc5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFQ2303336.