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 0xd7a7f696a8022b91a02b70485a79c07109a1d70862d3a730102e6b00f96480af. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6071d351-9626-474a-b638-8ef81ff94f53.json and https://artists.proofprofile.net/proofs/artist/6071d351-9626-474a-b638-8ef81ff94f53.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 0xfe7a626d215a3cc803d391007fec1e0953223dc49012cbc2754e2b9208dc57bf. 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/CH6542446275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a3890d0859e71cba2f09f915ee608a7069e2f551a43582383c9a2c6ca0ad9. 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/CH6542446276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35538e38bebea59c67489b284c3a3cd3c9f0b81356c4dd21a4ae65d1c4176e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CH6542446277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726e3c551af9ea6efc5adedb8e0dd7bb67e7e5106a0247877ee02d4008d795bd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CH6542446278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c5c9bd4e2d2346484c5cbce65681843e2e657a37fd77c93cad22ecb63d8a8. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CH6542446279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35807834de6c36e7d958435a6729e1f237e195f76cdc7ab364ed9a8abb75a7d8. 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/CH6542446280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47403aee96a8bf14274291937aff84762c323bce1c7137d5e5b52662a6f4cb0a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CH6542446281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f32e8e8e87b7abfc0f9f051d2e9d69a14e7e25d6abdbf0b1f09e309739bb53. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6542446282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371677aceecbd8334d17dbdaf5c1b594402b15f49747afbbeeeba90625ebc692. 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/CH6542446283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1a41dc07d3f698f39434bf4d039f759ec43ca811612e6c67a8cb9456dcd1b2. 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/CH6542446284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34b1caea8909d205ebb90b7a76148ed44ff975d2b117d075993d8894999715. 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/CH6542446285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd165afa41942b8b3af811ae640a5bc42769b75442278e6f837bf38a39da54f. 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/CH6542446286.