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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa541151211bf5a97ae10e899838f9cf15b07f5082932b2ec21f05af99ac8e3fe. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1c10c2c-35f2-4365-a5aa-972786718ab8.json and https://artists.proofprofile.net/proofs/artist/f1c10c2c-35f2-4365-a5aa-972786718ab8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cherry blossoms are blooming - Instrumental
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76ef830fed6a89185d9ffdc99ee97a28f0033b393116efc2b7582a8e9a8ed3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPP2161268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eef1d0c160edec78913971d82b0accddf94ee3f4bfbfe933994afa1dc0a87c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPP2161270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e9fa838e5bc3fb7c2a86474e1a9ab66ea02fa7871c1a005d6794e10d98763f. 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/TCJPP2161272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a3f857c4ad343fe3f4a55782cdbbd3a196afa1d8bfa190f23584484d8b3c9. 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/TCJPP2161273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae3faf0b724f17f3e379f33358fdf0811a5f6e259b6dc81a29b45c8f4b350c2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCJPP2161274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c932e89e17fb6db49c84aa2ce201f26c8fc3e0581f1e474f36904647a842a9. 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/TCJPP2161277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60ef893857f51c8b8c610039f8522c244cb6fc21b0c1e8ad093765d5b66f35e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/TCJPJ1998405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7149dcd4dde6e99343d29831781b4324df56eacc80bbdb7d6f0a10f9359396. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPN2055847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759539691008f0f041a77832098b3b1f6290d8505224e1b0b9513a48b2d4a8e2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCJPN2055844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a014880cb9d1848fa73eb47821aba1e9e6dac03f5e15496b3f7dd2175189c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPN2055852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc374f6c5d4ecb01cb8fb2aae4edac1166de60be61a489b0da4f72aa688bfe724. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPN2055854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1426599eff2ea4d623e2fcee35fd8ee0ebf4eb6c983460b53ad512b43cddfc90. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPN2055858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6637108a3c048f682f6b3ba13ee30e5ff6dfa29d2f5b147cde49759abe5f5091. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCJPN2055860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13119da8dd8adbabe20cf5562cd188b51c791335c1124f86c08ff051e975ff10. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCJPN2055861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeb5957d9e0704fd5d7e1383bfe564d388905338a02dee13e3bbf2df4e46ca8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCJPN2055862.