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 0x57dfdecb2a29a34a1dd9d304822e78512f5e424c77df3b0545c78a7b732ac0fd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/affa6f82-9822-45c1-b887-c3995890a8ac.json and https://artists.proofprofile.net/proofs/artist/affa6f82-9822-45c1-b887-c3995890a8ac.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 0x1d260f9db3122552da6447f4bd80e7f8d9aa52ffa7bd9e245d21eaaa5c96777e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:06:18Z), 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/QZZ7N2489863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10b2c18f10aa80330dc15111abc82e799d4268a879fe4c9e2cfa2b7e181fea3. 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/QZZ7N2489864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b963a8f6f69765789def488a2327a04ca46b90ef6ddd4846dcc265872e0c02a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7N2489865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee8fa100c71cf1e12e1b420a9b68a51b9e781a0938ae1597c1cb2e7446d094d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7N2489866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474494596b548b3fa73caeaad2b608ec7ce3d10df4176eec07bdd3bf1e42cb4d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:09Z), 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/QZZ7N2489867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd0b33314e2996fe6bbc9f66378c581eeed473d33a440d76673c735f4ff799. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:07:10Z), 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/QZZ7N2489868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310bd5790ce9b397f2d48c3a29a105fb594d23a37c21360010fee335c76e1cee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:42:34Z), 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/QZZ7N2489871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61fc7007092677c82c63eca58e093b57a231aa418214b94fc1fe702b3d7c547. 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/QZZ7N2489872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d8c08ecb43854ab9958dddcdf23800252c1dfd7da3569a752e10006af530a4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7N2489874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652a39348f1c02f1b443bdb32e2921d331b5cf85632283ecc6354a0a91e0b76c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:55Z), 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/QZZ7N2489876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d6a6612c4f649798aaf3f74df5c8eca1cd3f91fb6c9536d8545f2f45d46520. 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/QZZ7N2489879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3cc1faf8fb85798b63f4c044444d7f1086b0c0ed2a3998101146caca1b41ed. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:19Z), 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/QZZ7N2489880.