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 0x4607e1553ea366deddf3ea94a3be8db01a727a6f195df73ebede6e23861fb71e. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d51a0f-0513-4808-9624-292c74b96d64.json and https://artists.proofprofile.net/proofs/artist/97d51a0f-0513-4808-9624-292c74b96d64.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 0xba084166d9da9ccf10bd466f9430a261b19d5732e216e9c2dc52b922bd7b0669. 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/USLZJ2113498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d0108aa5b2c28bec02dd021716afec00b562da679894df3cd89aaa4c2f4948. 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/USLZJ2113499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b9f61f83179848e166ec59727f60f744243a5f48ff89eb62ac739f2f281bed. 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/USLZJ2113500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a689192a518d95091a719f0877882210eafd30bef412f1e638f4ed5fde34fc7. 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/USLZJ2113501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea71108f75633c7a7d671a42240954c239464392543d0cac74ba74a9010feac6. 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/USLZJ2113502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6fc7ddabc644ee7fa84574a888e9632986572fcf6d476c63c703ac53242095. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USLZJ2113503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb141b9caa7be98d71bc649bc1545f30a4a746bf83a6beeca32956effb3fd8241. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USLZJ2113504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a3814cfeab4cbd2df7c1ac7404c3f7893815e53f872b629c0e02337e928987. 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/USLZJ2113506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d21a36fb2f15c0d21a6353bdf46b0092c3a4fff481700b2e1001832f10d9a7. 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/USLZJ2113513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e156768b8267780691c7ebcb781cdcb3611c86230f19dcb35bc3dcc3a75857. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USLZJ2113514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0106823b078056a13351b88dd5095ebd5b718a05c8c5102b2d4f6b009f00f84. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USLZJ2113516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19b9bbefe60d7dab1c9d7e1fcc5f80a4f6e0321c3f8486c90482a7b23dd7ec6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:38Z), 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/USLZJ2113517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19184c88119831ae0bc680aa8bdfca0ff97a116d4dbac4280595f708f91bbc6f. 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/USLZJ2113518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f416c4b4db84ca2c8ae47568b8207c5d1df6a88c509ac812c13c4c4e513c2d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USLZJ2113519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2c69dfd63844a03c85141b3180a466ad06256b9e1220b371ac4f357684e60d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USLZJ2113521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff866ee807dd603b231cd4b4764423d3408769e23481034bed6b2cafbc7ba29. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:39Z), 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/USLZJ2113522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024722f3416c9d3ed3836fe871ac7143ef357b56b1c6cdc5ecf20e9c967cee60. 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/USLZJ2113523.