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 0x8245cba9065f3d2d78151189cbfae2c78c2514b425b0c44742c9bec7e9fde929. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52b88d33-7dd8-468d-8cf0-ecf6455efd64.json and https://artists.proofprofile.net/proofs/artist/52b88d33-7dd8-468d-8cf0-ecf6455efd64.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 0xb96deb19d16599a59e041a6a6da6e35cc80160332698fd764bf0113e96130486. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US78T0502184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e8e18d46f6a8d4b52763310eaa3e734d634d97fbac18655ff3ebe201de6ff. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USDBB0992414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092bffe473133cb290e44995991f0ba5605b36b6e7c34f51902db364cf556851. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:27Z), 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/USDA12303124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae4f72d5434234d5a70925d4ef33da1b807f9835d57b35a75683aeca7831b0c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9NG2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4201da06b74505a95a008f606a1ec79cb82157ad43e5d3af6b815a84bf3de9a9. 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/FR9NG2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aad204bae9dccdc4e00354fdbd21fdb179a8177fd2cba4cf2483c3049e30627. 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/FR9NG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6279bb68ce82441da512027c1bf1503bc1fb3d004ee908434f4bf088bd24e8cd. 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/FR9NG2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec25a805e1a19a87953cfed84ff67682bf52107ec3095f01b20166731a80cd. 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/FR9NG2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea7490e124c5178a92c74ea0d124d9d07f1c77389b92a1816bb9047378a4cf. 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/FR9NG2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138a90c0ea2b806b1c5bb1e2449b2027db29e5d67d89659a7524ac6ccb13315e. 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/FR9NG2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e45f81b54fd2600da80cca21b473c7af5ff7151498607d0d3284930360b6f0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9NG2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f979f66671771570b241b2405a7a2f722a7e965b21a1ff904fba3c81af36731. 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/FR9NG2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0238e155f65fe8f240670f0323b08cbe22a398477cd8179e2ac88d475e01240. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9NG2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da013509adae342476790005312e11b0905644f62d7a9d33da5aa3955cf2b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9NG2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f379a61e7855cdfd491c52668acab2521f14a32a4a8f781ac798c7ac45d95a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W11609917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5765d2afb82932c52a1368dd87a430f68738f26b1e01b95a6eb67d7f88e312. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11609921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ef32b7ca2bc72aff70571dd3924e4e445a37318d2a08040d9608ba1a243385. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W11609922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d1d9e14cb8f811892eeec3e2cf2de1f7dabd13474be20e9510e94d2ff9a78. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR9W11609918.
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 0xcebce687f21207079a7f35deac20ec3373b8372e6fef70afe7c52e62b26779ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W11609919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f3004bf444e6d50b5a214e07a292cfcd99fec9e23887ccbf59c5d796597118. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR9W11609920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7e5280e6a25692c0fd1404f641a9184a4d67ae670911c6447b91cdd1ffaa4. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR9W11609923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847b6e153d86daa536c115c9ea4dda828a2e1f7ce94bb6b137c5b33fad6232eb. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR9W11609924.