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 0xddb38eaa4bddc3797fc92ebed60fcc12131ae0a17d1e53ff3c3a8acd97b51a47. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41ab7e15-012d-4bf2-a68d-1b634c43cccb.json and https://artists.proofprofile.net/proofs/artist/41ab7e15-012d-4bf2-a68d-1b634c43cccb.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 0x6c173e059867cbb3a25a189f72202242542f7d06ad5b99d0923c6d443cab15cf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6FC2305137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7181b2bd5042463fce313534d8fb20e6af4e20efca66c49303e63a2f08970e3c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/SE6FC2305138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0655530a33b22af1f14a341d2fd6c09e83b2bd66ea1f5fa525b494506d1508b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/SE6FC2305139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af8327b1010cfd0c65132357c821bdc0cdcbd246064569b39f72c949255a5e2. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE6FC2305140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc335747ca5bdb7fbf1ecae19d778858c44174ede8305d5d67c59372ab6c440a9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE6FC2305141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ed6c3fc838a26dc0d04906aba65e34442bcea67563ff1b2aac3bc3fced1fa2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6FC2305142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7038ed1986966117b2dbcbb8928959ab260d470e79d7ec3ac53cb015c87c4065. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6FC2305144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff78ad2d9419e3b109d57b5f2d3c4c10948f7b706fa393b94ac4c68a8e84829. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6FC2305145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb1b3df95d56bedbc92eac0101aa2f1ca5b64665c69927178abc214735fc81f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6FC2305146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4306651e84cad212837b061d93204d64cbbd018b751e0db64bca5b7538ce8a44. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:05:15Z), 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/SE6FC2305147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c122a657735363b551278df7c1e5c9811687ed5598a205ae4542af3f6f7a94. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE6FC2305148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92c2feb3caf91e1ca4ed03a783410922d35318b6e78089aa6bec39399d091f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE6FC2305150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea877d1acfa7af7be791b0db66d9c0da7298ae4fcd6dcd8742b403f9f4be3ef. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:21Z), 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/SE6FC2305151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b161d5670abd28e1c578c5d35798124ddb5a68ae2446c440f0ade1fcb39752. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6FC2305152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537274b4a850c03c311544e70d393ed2a6e1b066dd51a77f70e498a38f190d4e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE6FC2305153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ec2a964ede9794cf760f850b741ffbfb34965a14b445fc7d1307de8f4be3f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6FC2305154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe693192e10d159de238c17fae759c4cc8c7f3f30ef7996e343b798d33df4387d. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE6FC2305155.
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