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 0xccecbbebf392a60b5bdb79ce2479bc6e7fa4aba807d6c7dc6dd868508c1ed85f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ee8c8a-22aa-478b-9bed-a51c60e26add.json and https://artists.proofprofile.net/proofs/artist/21ee8c8a-22aa-478b-9bed-a51c60e26add.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 0x82188a432a3c36937f2ff0807431de4894e9bfef4ebf55bff0aadb4c6c9bc982. 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/NLA299800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c31887a385309f60c1d4d94e958be7148a9745d4e2c6dd9bbe0fdae35b9c8d6. 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/NLA299800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1104f35a0bdf978da61ed9f30f24c6e2b26b4f58ec4ed004af34a439383adaae. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLA299800079.
Freedom Chants from the Roof of the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87890d27a1f51047ad2f1e354896f41cc60f51dde076c2de7b3aca803516d257. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USSF11002401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120f634f3aae924ce6e636f3cf70afb1b31df08ee54fc29bf9bf2e6a01da575. 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/USSF11002402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d27e52bb46fddf3b9b658dcef57e327cfb3720800e146c7d770f1a4bd571e. 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/NLA290600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1922b3cedec8bfbb87ede896d6f56045a5632e9837b724475c3b42ba35666. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLA290600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e079518f33d33f1e6230c40b3aaffad5477531abedcfb6fe380cdf7b22d2d83. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLA290600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d590060106b7d2e9a2a3f0693812ecf96ced0c64ad5a592a1550e51975a9d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLA290600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3996f22b3d6d9dd227a34a01a4e0fb314f3e59fef0e7954048b68ad439f5b1c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLA290600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5e650575091f1327e019159392bea1e07f9d17c57024ca5a88f77c2e70b52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLA299700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a423e15f66e5ec96640ef16157b7f3e80e51a6102e181c31e5d44ca11ec48b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLA299700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750fcfab15c78f44563c0d06344586235cab5e08d19b82e66b4cddf618134eb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLA299700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb042333424b1ec84d4c5c47220ead2125501e883655dde7a19185b8902ff0df7. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/NLA299700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec83d37a87a4908add695eb5c3327d0467cbcfbea117b1f3590727d08ebfe752. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLA290600008.
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 0xbbf39c576e9cd94c4b873b0a553a20c5a5e0552e6985de1b3c5737dc5db70002. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:38:36Z), 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/NLA299700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cb0ac5f87cca237588db00c698b71e20f517b66887172e096875cf42cfb83b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLA290600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf389546cb7d265193e47c53008b74356161e8fd549d7a71ac2b80ddf46cf6eba. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLA290600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba589bc8b9dcf1add11ce314c6780dda0f0733830cff0de41b6a0f8abb2c3c20. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLA299700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032d5a8568f24586d482afde7443b3652fd7816324320d19de2fcd5495e3ef4b. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/NLA299700033.