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 0xe8b3aa8d202fc66936b3325c1162bdda9ce161ad891b93ce554a8250a96f3a81. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5be81da8-4d05-447f-81b5-e7947abc6b20.json and https://artists.proofprofile.net/proofs/artist/5be81da8-4d05-447f-81b5-e7947abc6b20.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 0x8895331476a1abb8f05a34daff99ebcf8b726ba76b68ffa44fb1230e538c305d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPE1670439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64f5b4a3a3f6a15594a42279c8fec712a0def6e913bea1034223ea2e7949b10. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPE1670442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8895331476a1abb8f05a34daff99ebcf8b726ba76b68ffa44fb1230e538c305d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCJPE1670439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83998be761f1ebcf598d5fd5340f9a57d105e4ed143092429a1d425f37d1dea9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPE1670455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8a5d9abffcc9a2bc57e649d5bee57bd6a853e7cf303f45d6a4fe6e8bf58073. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPE1670966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879702b6836845d2dfed4749a245b5bc4ebd8f955bce12bd55fb99a32c99205. 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/TCJPE1670967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd2ac6dff351e92cd47c2aa2d3a7faca4f66f6873c59c2de6b4872a16b98e51. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCJPE1670970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0332e7df21af9f87c1ba1164581b02643ca6f4d810d8fd8626ccb72128c28afb. 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/TCJPE1670971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2840e39b148772f36d919380f521bf00eafdefd34c67c7665d0e4d26cbb3ca. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCJPE1670976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d7cc67b98450bad597b44faa8bd4c247dbb7145f961e428cbf1d13a41bf37. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPE1670977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcae21c5a71907d714be07a0e05585d03993e6a8610539a5e5261c41446a5f0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPE1670978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e7cbed269177299c3830a2b5161ed051e9e451c21df00d52455cd2cb5cdb3. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCJPE1670974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d7cc67b98450bad597b44faa8bd4c247dbb7145f961e428cbf1d13a41bf37. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCJPE1670977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcae21c5a71907d714be07a0e05585d03993e6a8610539a5e5261c41446a5f0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:56Z), 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/TCJPE1670978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3991bc815fc3f8fd816eb095e27a0637e4c90af27247854254440eb801859d4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCJPF1775233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1b13b0a93268c264ab91da3dace6f7219b3f18f888c95d835374c5a0a9e6fc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:55Z), 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/TCJPI1997999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e2179771ae890331da4dd9f6379fc71bd01b50ef8ce5011cb31e8c77e6de03. 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/TCJPF1729029.