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 0xbf2de8fbcc2d307bfdb392dabf9928eec71d31ef595e2236c115b989dcf84e2e. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bed4e43d-9b39-4457-8b03-fc1d54e9250a.json and https://artists.proofprofile.net/proofs/artist/bed4e43d-9b39-4457-8b03-fc1d54e9250a.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 0x0410499251cb6d5a8a4ee4e99493f4b4f1f0c19a35dafd4f6666a9e470f3fc57. 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/QZNJY2292679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8578cb3c000a9a0deade904b53562c3fb700a898aca834225ccb927c04657b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2292680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc47be11571d1d76d0b1d026dc42887a5803d52918bcdebaedd8442a5b4f67ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2292681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66838176811ee1a9cfbd7f1441794c7db04a19e8985ac556baa9810ff8aab806. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2292683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073df9985b681a4b9c9b3883e85c93ff8b147d08c4bcc041b5b7635b9d28e330. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNJY2292684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec59000030ebe30c7f98139a3edda30a99e740a48e16a8dc002e399f8368ac. 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/QZNJY2292685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b53325ecffea2bfebb0ede75433d2d32266106fd0009b772303b9289e7551d. 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/QZNJY2292686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66b0f862a8c20604189ecf3558f934966328ec4396281fed02a76bbcd03a880. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJY2292687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab00e0347f984d81fe6c9d8c2ab2f20d5eb16d98fe78686b0136ebfc8c2728. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZNJY2292688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7d05e757e04bee1cdf730202edc57dc9dc1ee52d3507b5f243d7d7a0ffd55a. 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/QZNJY2292689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31410bd931f31e7612aa7f1b1c5a32fb8082d5a7f8e9d9af837c250b5a7dd62. 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/QZNJY2292690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f5df1f664f9e6e15687858a4416aad4fdd2fc1a1f51711b3c911ad338ce8de. 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/QZNJY2292691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c03b2eee4743fc64f103bc0a8fe1e1285c677de005ee9b2d119e9f914b52e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNJY2292692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95ef8f1a9c4cdbc57454de53bc51f3c4fd43617e245f0471daa91a666406021. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNJY2292693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52545ca61ad2473d559287ad93b02b4b539d637e70c497ad280c6cd12808e9e8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNJY2292694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951cf01b1c45ced5482c4efa025ce4065cfae8a719fa1b9e85044f51ca18e913. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNJY2292695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda4ef4cee5d854ef66c316dde24a3d90aece760e2e50d18d1115f4e5900fabb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNJY2292696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e512652ddbea2519b79dacb0bd5746e0a7f8a5b52e81e7c630f9766261e3334. 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/QZNJY2292697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d7a5948fd5bbd4a91917e96d06722de0f7d6dfa0db8507b253cc94af73dcb6. 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/QZNJY2292698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814773a4a440b9323d961ce66d3de4662f21bab8ebce22231ccba4d917b77103. 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/QZNJY2292699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d22f17fc7902a99087a31a3552e8993eaf17cb7403d64184db8d5b82167857. 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/QZNJY2292700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947fbe05f2da758a2c0b5a1cbcb020afce501ef1a0ad095261c6a08c3c518bde. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2292701.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ea6c3a41967669a00f4844f212431d2e8ed79c187e965c6f0326674fa120a6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNJY2292702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894d723f6dfa5e917815c41f2907b79e553209d063d3ad8720b15ddf6246d0cf. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNJY2292703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e69434717fc50ed2e10d3366d5bb383ef5dfc2be337fbaffb04fec9fa2d4a05. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2292705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50046a3345ca0fc05a530708ab6a4843c3118b8da7323ab94a4c1f5ddf900398. 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/QZNJY2292706.