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 0xe6b3dd08ce86a53f3e3b4f58d679da61d510b8492832fa3c0aa7a08f2621c588. 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/abb5d4fe-9a4a-44dd-b920-67b24b5de640.json and https://artists.proofprofile.net/proofs/artist/abb5d4fe-9a4a-44dd-b920-67b24b5de640.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 0x650de636cf200a7d80d0783298988c3ce92f46d468500e0117e9d7dace78e2f0. 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/MX2620282698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d8f66f84d3f7409c7b28564dbe156d05326827856e6bb72c6fe2bb22436be8. 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/MX2620282700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1717233512a7140306771eb87498be27ad590fd307fbe000977d564a136f56f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MX2620282701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597af58bb8c12e90b9f6083056a68a3fc9b8ea65b7a2581e847247d19516230d. 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/MX2620282696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650de636cf200a7d80d0783298988c3ce92f46d468500e0117e9d7dace78e2f0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/MX2620282698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d8f66f84d3f7409c7b28564dbe156d05326827856e6bb72c6fe2bb22436be8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX2620282700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1717233512a7140306771eb87498be27ad590fd307fbe000977d564a136f56f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MX2620282701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51c69195b407b1d3844a7492b9b30f8adac6d3a0e0ec36e4141b8d22cb9c18c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MX2620282702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc20551388e46e09dbeb4803b8e921431884868a2380ea3887f2ea80a7b2b3c3. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:35Z), 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/MX2620282703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d7df5ced885d312630158b75a1e56b4cd820a9fb36b249ef84cb8183450924. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6N21850587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169d7fc946a757b10dad1d26632b59a6550242820c4bbdf5299b43100d35a73e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM6N21850588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd404a493238212d426cb402d76aa7515fe71ce0dd98ef3f799161ff7c2429. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QM6N21850589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab4bdb85418bcc60453ecd7c4e7c8f419f06740f6d1a257e6787bc9fc89ce67. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM6N21850592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da3a64b5384fd0fc4a8896b2a7e679939ea4b97956b1db8ba57c47c81ee9795. 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/QM6N21850593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c33b5562483912c2baf7ce794989b9aed4c83c2724a4e2072ea80d314e3cdf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM6N21850595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5319c431f39c1cc512cc2cc829e84f39d2ebd9d652f02dec190a7246ed5c9a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6N21850597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e1d098cb2fa89f13fe6080ef66fc19b61cca7942e5f5ce4b98d885836c2377. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US3DF2419296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d405893c2ecd91f7d1010d36e92ec85747956edabaf19050ab4973878b7d4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:49:46Z), 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/US3DF2419306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4983c66f230dba88d17ba33e204b180c93e12d7b4609abb6c6677423cfed356b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:10:20Z), 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/US3DF2419311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91a2ed8686c083bfcc6c5c93e5d684d862d93a1b5b3c7c4ee27a1b72b4ea5c. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/US3DF2422125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2c6ccef395acb0a6380f8311d5de3dcf682590f5339006ac2da700a80b6609. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US3DF2422128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5413f74f547f1f12fee15a70612916ce5a8735314866218fdbcef096389a4a7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US3DF2422130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5d6447aab21030217fba62f487a93d009bf7a62de376aa21360281e06eab31. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/US3DF2422143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee20a56c80be4f8ec362e2719eb77599aefc85680897baaa7bbde8cfca68049. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US3DF2422146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6758751ae690e256f6dd16f443a27b5742ce7a2298397f83b5665455f85f99c2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:53:59Z), 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/US3DF2422158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72554a5d757e2a9f588f227955530a317cfa4db6b6867c42460f4b0fd802ba6d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF2422159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac2c0e6ec839cb48b6505e181638f361d1dfa122e411b894e4b13837618afd6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:30Z), 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/QM7282434888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06302c681baab16d580bb08bdbbdaf6cd39b7a2df080ed3e19db5a97699d52c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:44Z), 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/QMDA72407784.