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 0x2bbcd9767dfe042416abecbcd20c5d36ca0d0432f7648cce79846ff694ed396e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77028197-9900-4fe0-baa6-2697d5fe96e2.json and https://artists.proofprofile.net/proofs/artist/77028197-9900-4fe0-baa6-2697d5fe96e2.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 0x5426c57666a9f3b6206f826f77ef92fc3e8354cd35be1b23d059fa7376521dec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:44Z), 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/QM3LS2100000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833d8404f6de3ca0dde6dc98a620029463a78a651a2567574c665775117a83f. 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/QM3LS2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512b30d385ac085c3a8f0c0d34c8f9c04333864e6fd45b831e2cec353cddbf9e. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM3LS2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f245fd643b8c99bda4a87a2e58fbbad1c29903f2f42243520128d48b2ae7e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM3LS2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c8f28b75e6927a7e9e7b3a10bfc1d807f18bf878068006314ce3fe00a358ac. 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/QM3LS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2412d430f53950a96f981d8df6c80c6ca301125fbd8840fea6f73af74ab8d2e1. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QM3LS2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c8f28b75e6927a7e9e7b3a10bfc1d807f18bf878068006314ce3fe00a358ac. 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/QM3LS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfa6ce904593cab8973030510c190fd2abd11ddd9fa935efbe319c210c4b809. 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/QM3LS2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e6bd6a5d029d9df8548a7d02f9a54a95d2ee8fc6177397f9471e5c5521e043. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM3LS2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedb6bdb869d8c2bf450c2c124a99ff34ce1ba74b8a4646545cac35afcfd7263. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:24Z), 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/QM3LS2200088.