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 0xc28cd6d5bf80e35c47b74d25c403180886b5d8c2f0340fd5af75013a84facd74. 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/60774bf5-6ee9-419c-ba47-f7d0c5b48f91.json and https://artists.proofprofile.net/proofs/artist/60774bf5-6ee9-419c-ba47-f7d0c5b48f91.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 0xf9f6cf240a0826e378ae35996b8e77647ddc37466296bf9ad030c49a8fe1d6fb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TWAN70060003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830ee5c1de94549a6970e20af9aa236065e4ccd419aa731a664041b51677cb86. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TWAN70060004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003a17071fd1d05add5668e0cca77e1a8bb026b8361ad89210d5ec2db069f50. 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/TWAN70060005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dea3a7877f2e9b208ccb8fe364236a81b6b6c793258a24d3e397934e225cd6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:33Z), 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/TWAN70060006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1c473e8e2cf3fb22c3826d4ac5548166227d7b962a2fd8dcbf973ab535143. 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/TWAN70060007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f05ab985837679306d734ab0edabab3e3b95873139ce2dc968a2457408c90db. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TWD130600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f391bfa4228b117695e921d07c50b268a1294524c7cc1b365ba00c5d95d657. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TWD130600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393fc8fcf105a18e269cba539279e0855b19a36e23fc0f6e3fedd7be1732016. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWD130600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe807780c0feb66a47fb051440cf608d00b3f5725f8f219618afdfbd17f001c16. 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/TWD130600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe073cffbd0a84f376cd329ce5bac07a38c42f68944f0ce4c4d5bc9b6ebad47f7. 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/TWD130600287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f532a7ffaed0e10c67f67089246b41e00c3c854adfd1e792b7830740e2af641. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TWD130600292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d5dcd47262935d2ea557821e659b3068c977bb2cab2559ccbf0dc4d3e40d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TWD130600293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac075491bf46ef39e4314bb8e4430612fd6613548455dfcd6150054b6b17c67. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TWD130600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d07fed6169ecbb1877fe00c0fb238f362c4f1125ad0b9f8076cd7de5f5abf73. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:20Z), 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/TWD130600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d3c14541f675e3c3d4ee8c715bbb7626ab06a09cf22ea39fe2fd3b1b13c2c0. 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/TWD130600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8192047edc9489e64e076637f3425186eb9d39b3ceb7265dc27b72a5f690579. 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/TWD130600216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc8c06e1c888fefb017ee58ac78d1121a9ebdf458523899884f635416484254. 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/TWD130600217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4978b778723549bc18e69fdeff32016a3e7688dfd308d30d30c9802e556a36. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TWD130600218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbff4b884ecf76ec8294dcc06b5f58f46ece15eb776cb9fcbee3f6f49d32847. 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/TWD130600466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578644d0d36a73f7808feb4ccd0fc8eeddb27b2246c799aaff032a2dff2fc5f. 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/TWD130600469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fb3de440fa5b2a0c6b781ab922741e9972c9718a21492932002e3be08a6e69. 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/TWAN70960001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b834728bd3229879072a0c53f229c2e5c5cd99f2ddb59804aaf938a2c690d1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:39Z), 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/TWAN70960003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce32298a04fa4311c9b2ca98eedb81267ba381aa0c49c027571ec149910f854. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TWAN70960006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ea4f17489b80f1cb58cf59b31890ab897b99afe698bb9561e0adb9125a41f. 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/TWAN70960009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e00a5ff76d966abf8e6ffb231235ce0c1c2407e1795ead694c3f252108d54b6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TWAN70860028.