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 0x296240f7842f4c0e96fbf2d091d5b304379153cb0cef0a7ef252a1e91469eaf2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85c922ab-6742-4f33-8003-5378b5739dc4.json and https://artists.proofprofile.net/proofs/artist/85c922ab-6742-4f33-8003-5378b5739dc4.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 0xe6a17b89b8efc858ae805dbf4998702fd0431a6c4b60eea97df2e6f4721de336. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:41:45Z), 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/ESA012312459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ebcd26be0637adac97774ac94576cec6b1163f3f5742bd85bbe5045986c9cf. 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/ESA012345794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23395ecf8d2c62c526804a66a4025160d4e701ef7f2b5570baf1405275810096. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ESA012346098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23395ecf8d2c62c526804a66a4025160d4e701ef7f2b5570baf1405275810096. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/ESA012346098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccb6e4ca0db6a9bd19fc32c4efe78a902d4ea80cbc8cbfc372d2b94c47fee49. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA012367018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccb6e4ca0db6a9bd19fc32c4efe78a902d4ea80cbc8cbfc372d2b94c47fee49. 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/ESA012367018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe88ecd604a56ba773805cd06816270c8819cbb732727e4c065fc9a5a4b45543. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ972306269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe88ecd604a56ba773805cd06816270c8819cbb732727e4c065fc9a5a4b45543. 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/QZZ972306269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e98cdcadc128abafba07311168043669c2dae81097a4e659ff0485aba43ff9e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:31Z), 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/BXIV82335923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2995d4edd46d35c5c2f9f434b30d634326cc78e8aeb3e03f57a613f360352dcf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:42:27Z), 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/BXIV82336439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a98dccb0a4efc229d56041e8ca6412529b15a7eb1e0cf657097cabeb997a312. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:41:27Z), 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/BXIV82318325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f48030465cdb2b7294045bd88430cb0d559cc5f67b13bad3f11d7c707183a1. 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/GXBAV2520197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93076e338243d390be428fe3e6b46d73b57527bc92c21e76b389f92a8705e5ae. 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/GXBAV2576843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cec440160daa60db2e912998f2bbf8ae7592bbaa6244113e12ada2edba54d9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GXBAV2535452.
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 0xc3ad928cb7c289bfc49f187af5b221da5fd1b818626c4d0c9b117ccd066eb2d6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GXBAV2503358.