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 0x740b444d99e1fcf5a14ab464213197723e7720086a606413a9d928c95377ff93. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48aafaac-040b-4983-9419-703e7dc574c0.json and https://artists.proofprofile.net/proofs/artist/48aafaac-040b-4983-9419-703e7dc574c0.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 0xb05417314f5ebf56cb220e87d3b2117cff6f471fbf9c49e315fa8c8637cdfc32. 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/TCAEO1924094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac56bec9b1aa26fcdd9547ace8a72ee666af41a38621fdc629c13586d35e13a1. 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/TCAEO1924099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895e24a382a82893f5bbec5d306b106d66a2cbf1525a7f81765722c9daf5af3. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:22Z), 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/TCAEO1924139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3a395344ff3e7db34ea6339e0db1700528eef01038758e583f35e2dbbadbed. 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/TCAEO1924140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc981f9f69fe68a933916503f82c2aef1779009bcc817e2afe1cffc7d19b48878. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:36:09Z), 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/TCAEO1914941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469158182162506092ef188bcf2f8d870a079bdfc4a40fb15cf86713cadc97e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEO1914948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf425256ca085fd7d0c4726e8a756000082171cfa1a3b060d8644e7bc88b8712a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEO1999786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d36e7b1089a49428c8f090a295212c7c453f9303a24fce95333459adfcca16c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAEO1999788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8534f76f4deb385151caf4bd2379ded8f51f7adf522fb2e3e1a2efe5aa421de3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:01Z), 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/TCAEO1999791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3bd605ad98b3f84ef2a6c219cf1a4d2630535203c1ca1fb8096dd7a13f7cc1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEO1999794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33922d8bc0d223c4c3255e77efbaf25a9365f1c4b67e364c6bc6790eec964a17. 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/TCAEO1999802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44325ed4082c1213e188b42ac23030044a763c2edd0db94d45cbb69d81a1b66c. 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/TCAEO1999838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df183bf4735a97c916d3495a2b600c9d6c7a12021ed4aa520021ce3ab88460. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:39Z), 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/TCAEO1999839.