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 0x5bf8713981a3ed422f846d415984b6adcd6a07cfe354f90c628ec28cbdf9b1e4. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9b893c9-30d0-4fef-9c69-8f0969c0ddc9.json and https://artists.proofprofile.net/proofs/artist/f9b893c9-30d0-4fef-9c69-8f0969c0ddc9.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 0xf0318f3c404915f7bf38c97143c6c1833d454bcfe4e54c5cb181c09bf1d53acf. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:20:43Z), 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/SEYOK2301167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c7a14a20460d812e52090f53e7461fa4d6b475a726ffe6e9710c45ada8fe9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:11Z), 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/SEYOK2301169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ef3d38e4c5ed4d052642cb3430d911e87d6549135bf296f7efd15140a07abc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SEYOK2301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753660a0d4d6ea1c81fc6a8870ba9cdb3749f4682ecdf7c978b19772492ea3ac. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:28:25Z), 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/SEYOK2301173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eb520e2ec266f7d03ed31c55e86f568d2fee7c1889106c07e8cfe28d2c6cd0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEYOK2301174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f11639b5614a4f789da6c61f86f9ff40e025ff715aff273a62dad5dab25c4b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:56:02Z), 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/SEYOK2301175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4904bd8b348c6ecfb0b119aab1018b4da35c9bf10b13e624b8f2ca18d4f2bed. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SEYOK2301177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803886227dbcb6038d407c79f3b776dc2fd7e9201464302f06b9b7b200f2822. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:29Z), 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/SEYOK2301179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b247113e50110c8eea1aef4246276f5c871c732ecc29cc1ef2ecf12e38a63. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SEYOK2301180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da151fbc05119b9cf2715464fb4443afcff558e446e203e55824a982e14112. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:52:54Z), 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/SEYOK2301181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ab31583261a1f2e32a6a25bee6515371a6c462f182dc41918697382bbacbd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:05Z), 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/SEYOK2301183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dd7ae82bc1cea225c6cd29b5ba46c606da6d2265cf849530d0d0c22cda3a33. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK2301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f175dd7c731c78d3c030fb78abd9dae7d649e0ca0d4a602f0e6a83495b9a6dd. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SEYOK2301406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee51481957a0a4bc31aba9af9e99ec831b57250d2e6ff1ed095486220f3b6d. 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/SEYOK2301407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25947b859efea08ea627c71661e7a9f51a8351d3b3d2e305e68c8d587d4fc0c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEYOK2301408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ae1362aa8c3c413c46e37f04a04e11568047deb75ec4edc14922d0fb77b705. 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/SEYOK2301409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689c9126182d0a99978f45d48186403074827a47144d0651c77dba1f4f719a13. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:39Z), 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/SEYOK2301410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a3ae8717e4fb37f3924aa5e758cd4140a9fb56fc2e734242fc4ce55eca4287. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SEYOK2301411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abeea5a6dfa3a3a8ebdf7c3bebbb7c3e10b48a8a8f48b38029257c6826267e7. 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/SEYOK2301412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a8e9530a2cbf5d022e7eaa1322db4f7e0c8fdfb12ff18be45accc64278b36a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:24:48Z), 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/SEYOK2301414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618f36ffbb501211d7e22b5c0a989b18c6653c5672a891e0427a19ede07a02c2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:22:34Z), 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/SEYOK2301415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553242e77ed51c18925e137930a4d336312549a6ab25efe951b9e6fbc4031e2. 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/SEYOK2301416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4e4c5a6a3313484aad1925e5af4f610db61cc1a872f1898cf37531d1ce1e46. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SEYOK2301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c85ef0e60e5d2d388a3aa2ccb2ecb1a71908f4d5730d33189a727ec50d958e4. 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/SEYOK2301418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06cdb8a5194d4197c729fc40d26a0bae88ebcc2c8eef599ec95c44fcffdbccb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEYOK2301419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d6a9805350d87d824ea7b92f66a2931f78884ccb50e696ef7afd01c1b48b44. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEYOK2301420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e147db5ba72d33ce495cf8e94b61a7294d8376aefc0f0eb1c33e1fa8531ee4. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:33:34Z), 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/SEYOK2301421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3a8887c2ddf83e42af00f6c5d15c6afc421d60593c10903cce274ecc19e26. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEYOK2301422.