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 0x804f5c39ed63e694b7e098dc31a71115a01d6f3694aec91a6f61b07f36066793. 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/de0dd134-b286-421f-812b-4f8ee206b97f.json and https://artists.proofprofile.net/proofs/artist/de0dd134-b286-421f-812b-4f8ee206b97f.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 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 0x74b7b384f28362e2fa9e1aa2460b8a9ba78e80e3f19ade8896578643b6015451. 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/GX89G2378505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657a5bd0fc2c6cf7d5fa785fcdfbfd075ff781a2057f623cefcb7dca68249b2b. 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/GX4R52270634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147c6d5e72568ad414a7addfbbc19c5d551562640b0a62bed53862cfa48fc17a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GX4R52270655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d91b7c4a3535bfd64b695a6b2f151e55c4cd545959e5098d0262f8d3af6b13. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GX89G2363839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea9de34225fd59d76bca5cc3dafb5fe63fa5a008c5579f52a009e2fd14dd67f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX89G2362700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a754d9053fd898c1326ac85cfef972df0d67d726aa975550b66799d04d59580. 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/GX3HH2396323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ad73e72d9637afc934c2e832ecc280350bd0392d010c3bbd4f44acc2cd7ef. 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/GX3HH2383383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caba17e5b17d6077b8c1f5d204995176a79d889568fa9dcd3650ee9891c629d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM24S2307325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22ef7e793c9b064ab624dfd65dde97ac2cc23c1842160ebd519eab3ae87573. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM24S2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aec9ae2a492a4047c13871beec20a9b125130e85a66f62db277f1b03339b49. 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/QM24S2404636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c4303c7f16df249c5d14276cd28e45774479dd8b1916383782d553df1c481. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2407035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfcb6eb54b1956ab837076c543bcde95c2e203240a16aff3d606dc031eb2579. 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/QM24S2407037.
there is a pity beyond all telling in the heart of love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe004df97775e3b0d902930d9ea344c33877c916b88f3ac4c0ed51a40e0b65. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM24S2501684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6024b2d6cafe710635f9825873f7f90947216ac2a7be1cb2315aeaaf803e1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM24S2501682.