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 0x8a4c82b9fd84ebf7215ae242375d315d16d4cfe252af5fcb38effdd129542449. 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/faeff6e4-5764-4ca9-b6d9-e29fce1071ae.json and https://artists.proofprofile.net/proofs/artist/faeff6e4-5764-4ca9-b6d9-e29fce1071ae.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 0xe29802f6889eb550f2e05e29da075914ef1e15da9645ef565ccae465f1783588. 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/IT8SF1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e811be3d5d81b4145544851c21ad428d7eeea35604fff465db8b3a9fca0ede6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:49Z), 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/IT8SF1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8ce943f3d40d4fb518eeeefb6ae4e875cfdba095c43e932f82767dfdc69b94. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IT8SF1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42c010eaa63342368291c2d9b890b87ba28e4b11b896dd201e8686053fd77b5. 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/IT8SF1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a259e4b95825cf4610d31768b956b6bb99022e9698b1bdde842d355395ba0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/IT8SF1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb09aa909d1430ab3801a49a329eefd6256ca4ef50e45b0964eeb7662d7c116. 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/IT8SF1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63da60aec69d7d53ac43c764dbcdca11a8712cf3d17185a2afaddd931a0ed012. 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/IT8SF1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed94966e5e6b4ce61333211c9bc972603f526d52b31aad911b0622c55de8f62e. 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/IT8SF1900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033cbb261a8a5c539e24d712cb71fd982db347e4ea5def941737e7c10951994d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IT8SF1900209.
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 0x75a4baafd1ebd5db2be30748220f9c3d27f4084f10f4cfa66a0aa0fd93c8ba16. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/IT8SF1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55b46787eb2312fe316da6864ea2e770458061ee07ab1e859f654b2d6d68d1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/IT8SF1900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4888b48e7d32d2bceecb2ed6e57203e6cad5ecce29ba55ae8ac82871e4ad06bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IT8SF1900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd266238231c08b5729f108f9bc7a8b29e397928ff6d142fdd6537f864b88f5. 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/IT8SF1900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a61d0bc324be4f2ff6cf1488e26f7a7cfad70efebc9efcec7f3010e35ac220. 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/IT8SF1900334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c95d144ea209f34d1d7d467916332c0b2dec97312a159aadd4cb3cd87f1150. 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/IT8SF1900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014fd8426ff63ee20e435826eaac65508fe5cfcd6cb15d359db1661270377056. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IT8SF1900336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd20735836654fb7aed04f3ddd8111de37a478124fc29a518bd6e1f0b4fed6e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IT8SF1900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1141138ee124297c03e50aeec4d6df3a757c793e318d7f2af2dec8e757fab9. 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/IT8SF1900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a67e5fabe5d95b2da41779157288706e8db97804add5d8c3483419321dce889. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IT8SF1900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48378d22502ad921ddbfbd9c03765174409b9406e106fb4d41ed1a5a764cf476. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/IT8SF1900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3accef0c5cf39e503104d89d4da88cc527fca210224ce84acd788aae8f781bbb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IT8SF1900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7f09a9872b8a488fc49fe832aa91b1a42c2f6660d36d757543ac66b4535b28. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IT8SF1900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb9b08bef569adca60504499e03138ca4956d0e9d2dce2d173f350b84d3bf2. 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/IT8SF1900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769a5ea6f3c9eae4235f197c835e5818a809d67262aa04468ab6f11eb2a462d5. 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/IT8SF1900329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025f6f3529f41d9302b006c1b52bdff0e762f2c4c56af290e998053089a53e47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IT8SF1900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b02226707e4e83af441ce022be95b1bb2800604ee697549af81157549b310a2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/IT8SF1900322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f77fa596a0bd3281ff5c162949df8a8188ddcbe97cef34ea2aa1497c85f7fe. 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/IT8SF1900326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc917270bde874ea8c99f6cdff9b47ea64a894f648a4cef31cabf02ab12c8b95c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/IT8SF2300337.