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 0x180c5a0acefc48bf9c1b31d6360a68f3586f42a85a34cda59dbbe1cdf7336d01. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/732d55b6-99e9-4e8d-8aee-97fbbc0abc10.json and https://artists.proofprofile.net/proofs/artist/732d55b6-99e9-4e8d-8aee-97fbbc0abc10.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 0x1bb63040cd1ff7ef1cd3c8b9cda5e870dce17349cd2b2997e27157c87a494e1c. 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/QZNMV2144088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb63040cd1ff7ef1cd3c8b9cda5e870dce17349cd2b2997e27157c87a494e1c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMV2144088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459915861d8ccb8e37921f0d58c269024fd51437f899c42c96331a217450f762. 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/QZNMZ2101448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f640c32785694839afd66eab660df99eecc299ebb62fe50b682df559f0ccdff. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:11Z), 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/QM6MZ2219848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947dafe69a3186916f452d6de7a8a13baf15a57d69d17e07018b672eff67054c. 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/QMDA62287550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7733c348694606d0a46de955cca69e0b7761c0ed227aa8fb3745c2e99dab4502. 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/QM4TX2349434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ade7b6ec3f8a8b6562c93bdb750085daf26217f4de0d495bdf3d57ad6589d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM4TX2383602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e25f3d5b6d1a9fe7d32165406f606f578b040a57491613dd584336b53ea8369. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TX2383599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e25f3d5b6d1a9fe7d32165406f606f578b040a57491613dd584336b53ea8369. 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/QM4TX2383599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ade7b6ec3f8a8b6562c93bdb750085daf26217f4de0d495bdf3d57ad6589d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:50:09Z), 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/QM4TX2383602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ade7b6ec3f8a8b6562c93bdb750085daf26217f4de0d495bdf3d57ad6589d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TX2383602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee66bf2177a41e1c5cd4ff0df568b40a17def539d07ba9a07a2f0fd47da3a28. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM6MZ2422487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109339c1e2666ef46fae9f08815dc84a5b8d2947e225930c4f0ddb7feccbe9af. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2526676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109339c1e2666ef46fae9f08815dc84a5b8d2947e225930c4f0ddb7feccbe9af. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CA5KR2526676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109339c1e2666ef46fae9f08815dc84a5b8d2947e225930c4f0ddb7feccbe9af. 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/CA5KR2526676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0685e2727b9f2143460d12d54aaf573db84e2b9ebbccd74bacb2bfa32679d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62231519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0685e2727b9f2143460d12d54aaf573db84e2b9ebbccd74bacb2bfa32679d. 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/QMDA62231519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124948c35f655a83181197646c0f30ba42b39bcd362e21f6a677fe3578a1337a. 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/QZQAY2425314.