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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e9ad1ee7fab27a1330958f2269372e3faa8ecffa30d394c3601410dc13f9b0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99888102-f19a-4b29-9ab0-2fcf734b36ca.json and https://artists.proofprofile.net/proofs/artist/99888102-f19a-4b29-9ab0-2fcf734b36ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd48d6dded22318f8c9ed0ac1fedbb50e28b835b49b9eb6e802562e897cfdca. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCADG1727283.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6610efb15ab90c0a0e43df2916a158b8492037ddab6d14791e8770201121b102. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHZ42095786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ae7fa9bc77feb6acf69b494fe407f52a342166a4d536db407e4cd04b292d5b. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZHZ42095787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40adab7dad990010c452556225721d4fdccacf358d0fcf4dade7e072c29708d6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:14:23Z), 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/QZHZ52111280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcaa713ef47fed32a62cd583c6d41c8e6d36d0cf19e17d36b832e9ca3f38ceb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ52111276.
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 0xba5b72ebaa7d0e6ba6d07f60813cf9e66a5964bbc2a183d45f95bcb942a9e6b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG2505968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932653bd5bf3c9cb7e91e341f5181da2c585e70815a9a7489fe447c9f80e84ec. 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/US7VG2505976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8832681cea24eb19cab511862dd2bdcee72e046454acb968bb1a4eb741c4f5c. 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/QZNJY2461493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4011a19216c3513142efafd911cd146519488fe2a8d6b1052e6eac477da423fd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US7VG2505969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eefbc059de488058f94b6efe301b1708797410348b9b92e555ed7550e607504. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZNJY2449967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffd510e860c75f69ed5353f15b35471c01e3c2085c4534f601f0c04863135e8. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/US7VG2505970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f86ff01dacc2f21ebcc6e6e723fa55ea2eeff9db82338c999753ae4f2b2e5c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US7VG2505971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe90d2bbf8832dca2530ade07b9f761ae8c6a6b37eca2861fabaad960c79847. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US7VG2505972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53db6f42673a6003e3f77a48e9780fa194f56b6bc48ddf834485f0fe60adfbdc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US7VG2505974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83101bd05dc979df31db8a3a15dce9810b3818407b6d3382a172a60cb19ea76e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/US7VG2505975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16681e94931448fa08abcec60f3da20e20741cc3b3194958168e98247ec166a0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US7VG2505979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23507154b278bdbb9f5ec080615aef456751c4219684855d2dc5cac5f9d094d8. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/US7VG2505980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c675a3843686dcd3fd23e132e015afc205319cc31de4c52fe8d426770566ab6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US7VG2505981.