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 0x5debaf3fec14db41e623b0e6bc45fb29eb4ea33e015ab8a67e9057f6f3214291. 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/d302c0ce-57b6-44dd-bed9-886dc5ebe0d7.json and https://artists.proofprofile.net/proofs/artist/d302c0ce-57b6-44dd-bed9-886dc5ebe0d7.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 0x63a9558d005934b89958732f7ffc71e120c7684659809f05907e0e8e7d14d685. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:33Z), 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/ROROT0628101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cdd59fed88abd24991f9105b00398a5a23d84984c1d4b28223cb2115d4e481. 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/ROROT0635301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d45d6f27133d6d5d467bc68a7d72010889332ed488734ecfe1f2885423a57. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ROROT0635309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cdd59fed88abd24991f9105b00398a5a23d84984c1d4b28223cb2115d4e481. 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/ROROT0635301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7c95b0686d8c80ab83ab842bca60c27620cbd3e50de70251803413aaad5dc4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:42Z), 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/USA370572982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3d9d807cc7b4cb66d9e3aea90c33ad09c391b72eb795c223d693b53788ef87. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/USA370572983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff75b613ab4a5ec0ffce3277b167e0a9298a4fa14100109082cbcf84827596a. 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/USA370572984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8a4f28fb6e08e8efabe0bf93491573be4a7d79dbfe2375cf42c751af33b0f6. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:49Z), 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/USA370572988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4597b9a10878377dd9fcbf4ae34b49d440dbff6eacd50d2ddb38a73fb5ee83. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ROB011668085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380c7f69b1dd76b4ef88ed8a73fe72b2e453c1b594850ce3c634bf0f057f4d16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ROB011668083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ced797ce49f67a5b6effda8c37cd5cf4f4fc0b352f55eb10220be524bfef89. 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/ROB011668081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370fa008bb5c381ed5d374d6c23ec1c8cf8a97aff431b85a1715bdddd0cd3533. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ROB011668017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c3f6de5668fed2fe18dff465f6f27dfdc01907595959e0bf52a081e464d89. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ROB011668018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d5757d8fc4a68e425e0304bf08ada28bd355e5a4ba6e9bf32097a0403361c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ROB011668019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe7a4c683762c14a50dd9069ecc8593d192aaa40c126865270a7cfc8b54811. 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/ROB011668064.
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 0x3bf95c5d6f3540c8a2c0237204dfe4fb604c4d6e8ac15504c820a9e116c24ec3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ROB011668066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ee26d88bb7d400aea37a6b366ea8b57c878545091d79472a7f4a91b5837633. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ROB011668084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f9a2d6ef5c8266f9de4bdbf19c56f07f3d40e851e38ee872987fb30c3a2b0f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ROB011668065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb748ffa1bc715ce5e436b23a7e6b18a419b044bcdbf47fa646d18c6cef4731e1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ROB011668067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439d83f5bed00f54e75001be7dc04eb5de4c2094623fa6005ba17192026fb7e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ROB011668082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bf9925e25ce3e1b63909a1e201102d1597e053782c018865baf2db2f26cb73. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ROB011668068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607e6864afd29b48b0225cf3acdf834ae26c539a92eb65cb0d528748165a604. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ROB010804480.