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 0xd4da7474a9e15c9a4cf3b9533ad7edf59236012036a7cd123604092d0491e521. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fae76899-c107-4144-8f87-2ef6d138f7e2.json and https://artists.proofprofile.net/proofs/artist/fae76899-c107-4144-8f87-2ef6d138f7e2.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 0xe412214a5d190bb3bfd47c3cef60e0650cf410ff9ec4283cc6702bec20404dcb. 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/GXF9Q2568368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dfc67f43e9b4f3a6cef2e9ab68ae2b7ebb3331e057c9a02874a936d9eade5a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GXF9Q2568387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f3b91aeab8d8f092189b4c0e79d8c26aedfaeecfd37d0a61f5cd43e2628cd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GXF9Q2570253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a21217e40397fd3118afcdcce18c33578f01c3cfcc78439d3c38c6cd4b5c87e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXF9Q2570255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874efbfec35613b220b2d0d2a3a4c01e91a8c777013e3ac2395f362595aa802a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXF9Q2570267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2119cdf06b0b7c34ec8db2d52cfd35369303d18f6f1b7f15c8af96ee2ebc75e1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UKXN22501092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ce89b6af432ecf9c2ec09264455f0f4fb00f407cf0f7d9162acab2c10b001e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/UKXN22537787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698329d8e3c34ca499e3da95dca38e609685901e36597cfbe1a295c94c3c787. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/UKXN22537791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e75693e0fafc4017b25f931ea64c118dc78a642dee2f5918107ef554b49d5. 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/UKXN22537811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0028dd1607da1d7625c85bc2be7036fdaea9b64190e44f530b957a747801bd4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UKXN22532243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bd8588173f1d1b8f12bdcb63689ef31a221f4deb8fa092d55a51cf9452185b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92502839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342c97847de03a2272bf3ce9021db8652b6e0cfb187491367d80204a576b9f99. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX3Q92502840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb26fc8bc1473815784f36e990cb23131028ec6caafb1dc7071242eafbbf5df5. 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/GX3Q92502844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416f8bdbf7d2c9185861b3c14bdcf7a5f1fab542c946e05487c6345a9dcf1f3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX53U2577465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9190483dcef6d27f8ae61f1ef5fbdda03b373b5dcba659fa224d2e5e0a81ba. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GX53U2577466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb86cb301d7205551af317f98f479a435b4f7f12dc18d82cad338468724dce3e. 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/GX53U2577467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14bdd96046e18a19f0aafe8d697038c05ac20dcc992daf74f54c994a71fe37. 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/GX53U2577468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a540feaaa4fed52f09309b6de322d49e3036ec49bf796dad525007b12c1cee4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GX53U2577469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4541e9f4fd7ae46c63652b27ac28def46afcefb6ad8b464c4965fb0431c72ed8. 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/GX53U2577470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2ab7cd8867da328784d7b4bd08796823c32025f19f304e60f3f27df798620. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GX53U2577472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f15e5c3cbb8dc25056f3b4ecba21cf8940f5486eeb72cb25a0acdd84a7d607. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GXH2J2545910.