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 0x4524bc289687b858487b004b6aa59c14803099a91ba82c90939a5cf5530a39eb. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61b51ad7-d571-4025-ad48-332f2682b8c8.json and https://artists.proofprofile.net/proofs/artist/61b51ad7-d571-4025-ad48-332f2682b8c8.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 0x415844b36fa62b0aaf508317ea3cee4b8c0fa4f9f4502f14523a23439e524682. 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/TCAFI2149704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdff28b43802584fd94496008b871de41ebaba3ae326a37ddd9ad74922c7bb0d. 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/TCAFO2191968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491335af3920af5ca79fd7d892235f959e41a722f37e925f11473ebf97cc4fb. 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/TCAEU2035450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcb9211d6732b16e6c43868b3ad288fb46b459eee76cad7bc8b9faec9cfc731. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAEY2054817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042ea6f69e8f0670c9fc4f177741d6eab3486f74fc4bf42759587b28d120df3b. 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/TCAEY2054838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8029300b7b745d568c927632a78cd8a2712b0232de8040359cc6cdbf6da029. 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/TCACZ1783643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab874f8f31fc76442ca71d8d8a61c666c6b27e793ef759c29c62a89fb697d4a. 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/TCACZ1783647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914be2a9d5cf1c11985a8c3efc727ca64b17e759eb12f27e53116636ca7c8587. 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/TCACZ1783649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ab1fb69bcbc830831aef90b50cbb9f44c5900b7e51a7751c50fd91e97c6f12. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCACZ1783664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea27f41658b042eefcb8e363f9f3b6613dc4b41b92841aa31c619767b33dee5. 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/TCACZ1783665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb3d1601d3f2f22cb70ca87ccff4b11478ff7466eab37b6dd19676f14ce447e. 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/TCACZ1783666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47cdf84af0e373b3796f7958c254c057e414df0625b91d73991f5bfb237a89b. 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/TCACZ1783667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a370c1115324d5b6aef9af8397e4b60997a581b6b2985541db33bb63b2e8e0. 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/TCACZ1783668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72baff9b81c42eef5b3f9fde652fa728bf4818001d2fe38878a87085b5cb2653. 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/TCAIF2476053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b43820c4d2cdedda1094ab1947fc96e70232e36375c98a58422b2334de32295. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAHL2378676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a1bfe3d1f242973fea738e2f5741e2f930e10ba21df3114f0ebe31cd331ed8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEYW82102195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86e4473ef36ac295d62b9dd0ffb64b5a887d10efdaf94fbbec102d43ed5a406. 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/DEYW82102196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172cf46bb5c4f3774cac501e3a163d2f71b7140d4c7bf68f659e0cc031a0126d. 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/DEYW82102197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadccbe2cbbf99f392f41c173ecfa3eb2536bf681947ced7c9f7f5624690a5e96. 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/QZ5AB1624625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c11df1bfe371a1bc25c2127acbd1252b2b0534ac2f8779fa0c3697be353b85b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZ5AB1624626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e00d95a8c2dbf17518cb6b78b91e5135224abd1b419c364995ea2de4c7611. 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/QZ5AB1624627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc842fbc94dc30250600cf4645faea4e7b08fd4d06b2a692851316c96dac3b4f1. 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/QZ5AB1624628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69736c1bc97b5dc3b69700003fb159541fed6303af22a5b8db0a03191f87b73f. 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/QZ5AB1624629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bd32f996a3a1a979f7ade9862cff923a8d0278cf485679d08a3f9231d41c8e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZFZ22013102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac76087e0713b6de61cd4251a49d4259d1d374bb67c88ca924320664aef83f. 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/QZFZ22013106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cd8c34ebb33fc24e31cd8b77bb0bb1b61750eabe13fd3b7960002077e5ece5. 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/RUA1H2436287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d56b46de90a2be8db16be93aa05fe42ad230058c86ed1f5091a29649657e64. 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/QZNJX2074960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8f2ebd44c6f0cd97651ea6b5235d34025dfd237e79ffa2ac5710b4366f4bde. 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/AEA0Q2156503.