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 0x0791ce3c4eeb188d99c0a7a0278c6246eaac2056d621081e3775be80a3f732e5. 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/5439971d-ef47-4afc-ac9b-ca06d563a8f8.json and https://artists.proofprofile.net/proofs/artist/5439971d-ef47-4afc-ac9b-ca06d563a8f8.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 0x51ca8a9ee0c2d44839cdc16d2a820f2b6d438d43708e3138669d961dd610abfc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEUM71709396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d5c2919db8f6b3aee4c3e5db48417d2cde92ccea06b0a67a50f8762948b2ae. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:38Z), 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/DEUM71712452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3340d0dfc1655ac47baa88501c335b0c243aac421e60ef6efcd8f449c344c7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:06Z), 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/DEUM71724876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde61ec26c134e46e5d8389ac6cace811241e3d972c99053792326f698acd9d3e. 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/DEUM71806923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391241fc3dc18dae5d81956fcd6486b066a5e11890d348385b1d5687501e16c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEZC62170991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2b3ea354068bf4e63ea155609cd2c6e0d9f7b1b23079fa2bfab8df4f63bda2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CH7812199854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570fa7525881a168366d231fd09ed1dfbfef4afc6eda5ed797e74bbd050742f3. 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/CH7812105829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4549b31c2590c6e2d79e352ff7e43311d192583aa2fb50ec632fdeadec7e7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7812349060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63399ba25e13817aa7f43c5677310a57e60fdfbf3d509fe78e65011b782c6fdd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:25Z), 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/CH7812350187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea57ee82c21bbd7a68723a79adb227b780ae2f122f0b8611bd8a6fdcaa5f8b1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:30Z), 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/CH7812352432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242b25fdec7e27d1f3af17ed5dce2ea994663620d504fc05211a6df21856c0cf. 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/CH7812359832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ae7e84a1fe428cb63e69cecc1d08039bb38b218c671f1b11bb3b7082757c3c. 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/DEUM72000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e766e5fbba2b14290c0676bbd5d4914bbc22ea7ec0739b16102da91dd1badf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEE861807470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720c5b5e2b3b4ebebd892c6cbcbc6ca92f80d296d3b3df9d8383edcb59ade9b7. 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/CH7812217375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e766e5fbba2b14290c0676bbd5d4914bbc22ea7ec0739b16102da91dd1badf. 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/DEE861807470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada99f100933ad4a5b5cf6a5a3b468c59b9208a79ae62f0d9c861cfa5330095a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812355818.
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