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 0xb42f431706028e520c66cecba9479d0bebe8b2282381bbe09d443a42ca4bf87b. 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/2e1b5ae7-aeb0-4966-b26d-9cfaf38cc22f.json and https://artists.proofprofile.net/proofs/artist/2e1b5ae7-aeb0-4966-b26d-9cfaf38cc22f.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 0xcd232127038a74e3cf9a5fabcf0d8acd9262cf3202f7a1b13630e39f4314f375. 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/RUA1H1733828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa1ea60ff91089c9a2db84123daf85b1a7d46bb2b85e1f3dfe9b5bbdf0faa2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUA1H1733689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f861bbce63df3d228849102473cda8840ca829bb15d87b9118584f21eec1c. 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/RUA1H1733691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb945b2d362244feca04dad99e2d322f696497e46d19f4e33f8f3480f3ffacb. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/RUA1H1733693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bebb197deec078d467189ac99e2cadf3348aa12536d70a02c3db88991bfaa1. 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/RUA1H1733696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b1e5de52a5907f39e0a86416dace6bb961e76da3ab2595811bfc59589c3e59. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/RUA1H1733690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f85feb286f5aa8810e64c2b2de79ca5170824ae4bf287b066ce531634c517ac. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/RUA1H1733687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d97dd4ac03cdce5ec871191e62dfde479015184049938ec9e11730f83f821. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/RUA1H1733686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94143825e363ec73213545828890ef9d7932c0030ba6e9fe94b442a0a8a1b03b. 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/RUA1H1733685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31580625a4f82d4a6b871e4a5964414896e030f44b8ef389ba18449f9d1d7c57. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/AEA0Q1928285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26661a5e576eb7fe13bf617a841d69953c5010e2c3baaf6de40dda7a580b8953. 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/AEA0Q1928286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45f7680e7ebad72995e83925007c1dec54c38f5edea3b21da77b2e284ad96ae. 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/AEA0Q1928287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b4fc7a70d1454dacb43713e0210723b836cd7a814037936f4f227a16782f3d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/AEA0Q1928288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa812dec616b2935b93ee1177bc2c5aafb545abf3d0f5c06c6fd5db98d53066b. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/AEA0Q1928292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268a2a947ad7cff51ed8d4fea39ed4d5b7c11edee1f9751ecebe19034be7f2cf. 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/US3DF2528946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3200e34e737c5fd75a9f7c5933c5b32e66b2af2137c09a20d4ef2482a1e7df66. 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/US3DF2572414.