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 0x520a3f2a85b914936ffd9c594f672537134b614a97a190f404e23f9473d35037. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7191751-a9b6-4674-9963-6f2eb4fbccef.json and https://artists.proofprofile.net/proofs/artist/d7191751-a9b6-4674-9963-6f2eb4fbccef.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 0x776b4061ee10f697a169eed7620a0c0fa033398a054e2a53c4d3a5dd9c0f9815. 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/DKAXK9660703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4785c3bc0678196d714c9e50053305b72c82c98bf936c84cfe862448ff6028ff. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKAXK9660705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabdb39282d6a1241865e7301924b39aa5841ab47e91c26d1635d84fef48375b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DKAXK9660707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa855cb2da5138d7aefdfd84d9d424a77b77ab6dca0d0c0a6954f9cf6fa5c78. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DKEPA2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b073c6bc10a078ea51c0d83bb057abacac3923d6b799fa7ba058db0ad319e19. 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/DKEPA2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a74e239527cd50636cc538040e3b682d3cd06fa5ad4a5737927cbd127624f36. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKEPA2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca50b3a46120b67cd8d7e6b9c814a746e70615a15e628bce380649da962cf6a3. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DKEPA2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7742adbe099a38aec4a908d5c5de1b4c3e4c53da9941c08fbf864400f0ad1d. 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/DKEPA2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d297b13bb9769d58b842bb05b378ab2879835cbd8b29a5ee9c7050cfeb27fb. 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/DKEPA2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaafb82571c2466c39ab7bee147aab455a777c000e72e82fb03f429af296427. 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/DKEPA2100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae86e23b58e4df8fd92cbd40fe4e185eff7d0a38b2ab15c9d9a28569f61ad1. 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/DKEPA2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edc7e56d6b1c5b4ee09263c55175243ddf1f7b541e5a9c2773b42e3b853e012. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKEPA2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df055558dc873f4ddf49d6f006a3216d5c00e410429702d26436f3c6e6507d. 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/DKEPA2100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d142a9798e58f98f96a28c09161e18f0c54b05ec2cf33aafbb292c4f67b829. 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/DKEPA2100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb473551174c63d64c275fb05e18c68aec94f01a4029012fb045359b5831cebd8. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DKEPA2100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ffa7442b673e37c0832cd3bb0c1292dc96e7d4c40c340b83b658e71e286ae0. 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/DKEPA2100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aff79466da51cbcd32396581b9e5176b6232623bed35b938f7958369cc7e50. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DKEPA2100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c08f9708bb97f067b84e5bd33e4a6793ebc3b6c288c1f30f3763a7b4b8cb4de. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DKEPA2100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb193096b67e58d157cdadd79fa80b312f5687043a58ba0ba970b0437cce91833. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DKGXA0700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b12672752b766d098f516193fdfca2938b62e0d6747e988290064b588fb04. 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/DKGXA0700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a5743e30c9c8a0d84615aedf7f7f98c03f724f4ddab59cfb642f157fd15907. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DKGXA0700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41522c827ea1f394a99a9633d351e00a1c23b6a547b9f49f55eb64ef432e644c. 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/DKGXA0700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f6e216dd54f12da72b451770c1393dbb87a2dc772774c64f1cd18cd13ef50f. 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/DKGXA0700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b278121a0f2fa20d222ff3995bf6d1cb46c628e461cd26bcec87efd4f89b85. 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/DKGXA0700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be0b089ff137067b4cfd358c7796c9a5d7a44fda9e7f1c51980aafc6a26a59. 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/DKGXA0700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f69d4eb6ba631290fa4ca7daef42aed6c1599aee5c98568f72ab00c6fa4617. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DKGXA0700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12bb970caf37d227daf828195dee34b9dfc3b716a8619d6117917278dabf489. 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/DKGXA0700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef4f0510af6dbd95903642d3c3a0de413d6132ec9ef9c0a0922f970f251e2e0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DKGXA0700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef938c0cd477adc2edfb31e63f35f2a70cfc1d9eeda76412e254921e49f4db0a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DKGXA0700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e935c8644233a05f0bc0e11bd2608d73e0dec2923691bfd85f92d6570bbab. 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/DKGXA0700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91eaeff7670e7ec5c894f965b01c77f2715266c11994ffba948617fe7e59beb. 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/DKGXA0700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7333a9430d2a525b2de42fe5b03aaf272fbe37f08df8cc7dcb760dff22a85c5d. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DKGXA0700117.