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 0xba22b536088fc72a2d88a4dfa519012470924fd0257c62cbd95bf6c0a7792c72. 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/b7a886d6-5761-4ad3-9bcd-9d3045b2d3c5.json and https://artists.proofprofile.net/proofs/artist/b7a886d6-5761-4ad3-9bcd-9d3045b2d3c5.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 0x9b41f2b16d76a8e4b34a13cb0122d70fa2b003a104b5b26f234a6b72d6530fbc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES82306078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b35fdfbd475d7cb6dfe8b849a5a856c17b771f8aa749b01945a4cbb038a7b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZES72387987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e65e364d2656e2070a185a6e5294a923de390cabe6da0c4f97eccfed4490ad. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHNA2398733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58170d34e399d0e8dfd653d663ce7abb7c6e1cb12f90136d033c2512ef24329d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZDA62425296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74651a67e8cd4ed19574d29a98f63572217872184caacd57e9de8423978abcf7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA62425297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20d24b4c946969ee05031c0eaf42522d89733c99be30e0b941581172a8ffd2e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZDA62425299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ebb6bd3893050eb7373b3058e5d05214be49d7154fb20eb187a4ad4e79ce70. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZDA62425300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364e73425f9ad4d2ea5b4a78badea0dce1bb5a163f1848c6a005749c20143acd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA62425301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364a822cc8b8a91d4d49c140aadf159a1eb36af64d39a2a3564d62cafaf78318. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZDA62425298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20d24b4c946969ee05031c0eaf42522d89733c99be30e0b941581172a8ffd2e. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZDA62425299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eaa2283e9676a133d243e69e1031cda9f3bf632c61e6c3ca8472058a0e67e5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZHNB2456777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df09bd8150b6eed559470961d1a9646a60a7b214bffee1f04425fca1e0d6bc0. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZK6M2462164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57eaed75c8e301cc851315fd71ada33a2633f339fda2914bbfa72b7180374db. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ4J2401322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d5f6bfff9155f0b305c7dc06652737a9e051f8df2e939840c66403ed1f6ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ4J2401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75658de23f215d9c9c94657258c9c4ea2179f2253a8e8b408c33b718c53cd63a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ4J2401459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dfffacca129f7518faf4b18e5e836e8b5c6072e32ceca1f5fd7eebcd620b57. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ4J2401460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ece5421a68b8ff4e716bc799ef157d62dcd5051bd2a7f9536eac506d32dcf. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ4J2401461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77af738d8f3d5a7e90b426f4519c46e22a9aa66ef49023a45192d7ed151e58b5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ4J2401464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754c8a24e486a5ffb991f48fa6f73a8a54dac68d426d770146df2e7f7e3bdb18. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZZ4J2401465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c10f273cc40fb900259f1ecb1c52b4179ab5af4ee19db4a748fd9227c5ab45. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZZ4J2401466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb538f735adc1e6c339efe30a8a424a5db5fd88034886a01940c6bce028966caa. 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/QZZ4J2401467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f4994bae39a284e5d61709ac2394c75a6361294195396def19590db27cee7. 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/QZZ4J2401708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f222f4b2cbe25e0a4cc030fa26cdd46e4786fc8c3f15be6d80d8fa09fdb7d27. 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/QZZ4J2502711.