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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 0xe823c937901afa3105beee5daa5e5300949202a4498cd678e8d7f50d99426e24. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b64e631-66f9-43a4-a540-fe7a0d8aad47.json and https://artists.proofprofile.net/proofs/artist/0b64e631-66f9-43a4-a540-fe7a0d8aad47.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 0xb2daf9701482a8054b1433b874cff39b8fe3c3370b98c33cd4b46c6dfab735a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBHLW2001492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9f577559f4a2b3b536a0e1cbff93e3d14780112f29db7a3be732b86333904. 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/GBHLW2001493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ae6a183ab57ff7205c254873c25365bf198a2e3047966c1b645571122e8fd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBHLW2001494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0191d1fdf861c9c06f6741dfb83b533a5784ceaea07d8c4afcc74ac68426e469. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBHLW2001495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c89ed0a1b005e37022d000f705d92a7f43037474389d2c6b845ce15fe49df. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBHLW2001496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4300810fc2b48015f42fee5d0b7929f71f1969e6652f167a5bd478c2d2880c34. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBHLW2001497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426e454cc2d38a31e41066603addf0c4f8ac96eb0b071ba623c8839a36673418. 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/GBHLW2001498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bce01b8ad461b90525e2dda0e4f42b78e271506fec9d28517db66345e956d2. 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/GBHLW2001499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09628f1b65fd7b2d6588d9be17f10362bf8acf7ee0cadd94869a10990c6f3a8. 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/GBHLW1704688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc2eb5c9242490094ec8e74108c7fab1a00e80c6ce658c51f9861e64ba3d7ee. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHLW1704689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b8f3e0d48bc4ee860e678e00f0cc55fbdfcabc8b139f12d4292406565e996b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHLW1704690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6dacad571dbf8c89360ee06355c9492d2637acef8fb09e4aebab4bc81b2847. 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/GBHLW1704691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa650ce4006cdb62833115aaef1b76ff3df40beb686439ed050ba9f797275b4d1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBHLW1704692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb72b6be49ec2ede6747af6894e456197d3c728d4e3b864c3f9183c6a0acb01. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBHLW1704693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab17d0f6f313ba80ac279c91d05d0f4462680fd492de2ba9fbc99acd7aa33953. 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/GBHLW1704694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8789e74fa8fd6f13ba9442770276303f45b69c1534138e19a58225b2dbdc7ea5. 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/GBHLW2202568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf134deb362b1fde6430a5960cf0e0e6251c2d9891fe2a367fba0c895a6512dfd. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBHLW2202569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fac4c0f7fc238f32fcb963f0bee150e70d898b4b73160cee2ab55b6550fb2c0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBHLW2202570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d8503b464ec8094fb4966d0c028dde89a2ab84fa6e206a726d109ba964b4a9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHLW2202571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b14d3b392d2e0926edc7fb0f672f69aef2e1fed673698f2b2a647bbc68e23eb. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBHLW2202572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3989dc9fa95623101a133b1f27be39d75bb744b0bd2f99b851b41058aa8696de. 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/GBHLW2202573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fac4c0f7fc238f32fcb963f0bee150e70d898b4b73160cee2ab55b6550fb2c0. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBHLW2202570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf134deb362b1fde6430a5960cf0e0e6251c2d9891fe2a367fba0c895a6512dfd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHLW2202569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d57a8bb98b142d55c68883aa72f7f331df4d29605751efc77e77c5cb0a3c57b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBHLW2101455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff4e8a5971fe727b81cfe54b481c14be4f736c4c4f18b3d54c65b2cc4b7bf9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHLW2101456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff4e8a5971fe727b81cfe54b481c14be4f736c4c4f18b3d54c65b2cc4b7bf9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBHLW2101456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2daf9701482a8054b1433b874cff39b8fe3c3370b98c33cd4b46c6dfab735a0. 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/GBHLW2001492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9f577559f4a2b3b536a0e1cbff93e3d14780112f29db7a3be732b86333904. 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/GBHLW2001493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41295a0079d90a0f4d3028d4d470ea178afdb68793193b50748cae9a000df300. 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/GBHLW1803265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a4cb24d73be88d23cdbe51963f740c2a7e0d4383a5e19e4d4cf928d461dd2. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBHLW1803266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d66ff71ef123d7da9db88a646b5cb2d40a5db49598dd09c172547dc0e03db9. 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/GBHLW1803267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01336e0d26d6677adf4c7eaef5b85d75e83dc29b0128b846479cf8e285a32e9f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBHLW1803268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01111df7be1b75861d005242622a4c77520333e76c2353ce179a3dae16932e76. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBHLW1803270.