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 0x8c9fc31d1c6124872659cf5e563b362a09047735ebf7d449f187e62229a866a9. 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/082e21a1-7b18-487c-97d0-42bfb60b4d63.json and https://artists.proofprofile.net/proofs/artist/082e21a1-7b18-487c-97d0-42bfb60b4d63.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 0x3f8a64f3b7a3c5571b34d3c4d5fc3efd0270abbdd7c0805ee1e1aae8f4598946. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GBWUL2306217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c64d3b53c2e1c3f23f9d52976550a96b1b2f6ea0f4c99ae6203f8d6adea442. 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/GBWUL2306303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9992f0d3a0dbcbb0622ec57be866ad380e4847680a583602430aa0737175bf4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBWUL2306308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6925f14fa8c112af3d4a3672c5ba610661cfd434f4b3ce024b3c17f80dd874. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBWUL2306307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9d74ef613b462b10a9ab8aeec134d4b56dd1c8868baf58b14a8172e9b8d7ce. 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/GBWUL2306310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e4122f76f8ab8b29d115d01f5b75afcd6a85793cf5b290f7078649a86c715. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBWUL2306318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4b76e1859e44f8eb6183358ac90e09b362fac654adc6aae67f82d49ee4cb2. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBWUL2306315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b4a3723d1fee77455d4eb31c0783dc4d9ad664af0eb1eb287cd5c564da57d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBWUL2306311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e129da493ae77eed459aa6d73f5a9db20f7e58d21ded3fce332249158d1e16. 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/GBWUL2306316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014553b87ae831a22eb99ceda81d3707dab9933d908114e30d4601b99f0c73e8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBWUL2306317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76700286e7ae4c53196408d1b198ed38e29d42f9884fb9fcd20838367e2dfb96. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTRX2323407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2034def93d5dccd8dd2fa2c5e83ec9cfd9f4cf4d04d2672c2c604e0c9622ca57. 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/QZTRX2323410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33461ac9b48a7226aead0aa583b56001e3d626245fcdd21a9e12515b4a2954eb. 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/QZTRX2323412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce19d1579246791b1c1d6204ef3235912cdc3bb10fa318ea34f19f52aed5b8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTRX2323413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2cecd6835a812f06aff67a0e23e60c41f07b672c8fbca137945c8e776519e3. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZZ8B2345681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed658754819d9a89d270433390e7608e2b93428cfd9df9cddeaee74df492131. 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/QZZ8B2345684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db7d38843874b44a4bb2464eedc5a3e107a9992d0d5ee81b3a2c73163c2ff50. 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/QZZ8B2345688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa6efdfca85d93481b7e9ed675304b00d1bc8f18ec32adf0c098ce60ace279d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZZ8B2345695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f62c80360b885188dc06ab3c5e56ec46d5c41dcfe6cf8be1bed43fb0d2dc37. 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/QZS632404158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ad1071790fb31e8c46a9133ea277ad2d19f8d632e130f34e27c11a7a04c7d0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMHP2409429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75668a1b6a405b4660062760e66b4d0a892897686c49ed54a654359bb0ef03a5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZMHL2464883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941b79be9d8174e4790f6af2bdad94e79ea394fa65af67047bc962a3a77d73c7. 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/QZMHN2468860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd05bfd446770c206d13a41878b8338698745909ebe62833dadcdcb4462910ca. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZS652484302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa361b28450337a39c0adb509f4765cb236bfefd87443f09837b24c22ef2d4324. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM42K2424208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41028545c91c815f7f57ed0f6c5feda2a1452c4238fcaf6ef09163def4b15b87. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZS642426193.