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 0x4e31e6e4b19248faaf4a95622130a548f13653d87fa8c48058ae9f3a06a22ebd. 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/70c2152e-7f5a-4a30-a4ea-f9fe8abf7208.json and https://artists.proofprofile.net/proofs/artist/70c2152e-7f5a-4a30-a4ea-f9fe8abf7208.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 0x7595fce9aacb1c6e852d2331a9bc9f1f6feb3b514fecdd0a969d9d912f06cbca. 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/FR6V81934665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0da35a9de2258cf13847c70d33094295472ae07facabe683ac231c11a820ade. 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/FR6V81934662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d05e77926412d6269523744612bddb1089612c11b9bddfc7a4c673676beda21. 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/FR6V81934640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d65b63ec7f523dedbc3178e368934d89a60a2cd31a86f6584c13ea5ea042e7. 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/FR6V81935393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b1b0d4131792d1a9c37a443bee370e93b49c01f052848314e68d3860188c80. 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/FR6V81935623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2160cf148459e187bbe8e395ad4e3e8f2764f818c5bcce6780bec8040316ad31. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:40Z), 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/FR6V82694978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056f7daf94553d4793f65e303a41d8d0b51579dfe3ac00dc56f9d595c3dc4e60. 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/FR6V82694979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd5b316ad9ad608699e97d2dc01d07014eddf313559242984395483ac949f2b. 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/FR6V82694983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aaa65cd93d7c4bafd9244b59ae6a742a8e364284ed8e73b563b09bbf38827e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V82694984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0620863c20f894b49f8180a8f99a4d1b4af9cc63d8910753b0efe423b115b511. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR6V82694991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729ad64764871b5b8e42ced196e271225defad00e1d3147e10bee82f62e976cc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR6V82694994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4be0f80c6ed5a62c1353dd962928ccb8066fb6f6cb5b283bf3413facb64aa90. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR6V82694995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd65a88827b34acc44769f66776c82e14be8f9e6eb690aaef113e9368a96f44. 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/FR10S1558532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59abbe572806462cdb1f2f85f86d1b9011a729b1f087cfe9400063cd5d80061. 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/FR2X41543102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23fb072a29e666b0ddeafd281d4b0b1e2404f584a8335a1aba9deef1761ae2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRW241538591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd86ddf3e6baa81f7803698b5ea207af8a3eb98c3c708043235067048bc389b. 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/FR2X41657874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1d8090e22cc8959cf23bb215e76eaed7d79c4f422dbe9d7a30d2676b1f62f4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR6V82694986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6013c4c1c29f4725f9258ddcf48921961a46a9e5094bea744d440e4e39d90. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FR6V82694992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6f6550b13d72c4ca9e7c967f9e41fdbebcc204b5b69d95ef92bbcd839accd8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR6V82694993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0620863c20f894b49f8180a8f99a4d1b4af9cc63d8910753b0efe423b115b511. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:30:13Z), 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/FR6V82694991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4809dc692f5621032a2855cf2f3f5fad71620373b711bcf76f5e76370938771f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:47Z), 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/FR6V82694982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252298eab8543f1fa77181381084177e0d5664e214dcf4aa5d4f6938d522f452. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR2X41992120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afedab404c177ce94621eff1c237dc27f5d7f41112ef1c29bd835c4cb52f2df. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:33Z), 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/FR2X41992123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb633d9d38209f6af22684c95ce9895a1152502ae3d506ef11fc7c9e932d0fbf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR2X41992124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd02f285dccbbcced0108e973e7beb4718bceb4b1a83d27e524d1950c15dd8. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:42:09Z), 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/FR2X41992127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a1c5b60eb6d77c58408b416ef590f3dbcaa45c4d44985fa2087aa783455238. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FR2X41992129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896da4c1105fbc889e980ec50429eaee914301a69e1fd4dadaee01e3c55183c6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR2X41992125.