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 0x5cc4d42e45118098444cb89bd79864514e9a142117db88c1bb56664f2fcfe9fd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bc60ac2-22ee-4903-9fb5-a3f980cc422b.json and https://artists.proofprofile.net/proofs/artist/2bc60ac2-22ee-4903-9fb5-a3f980cc422b.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 0xe91680f38021e4c80783ca7c0396b1333384a74cd9e6196f572fc17f1a00c319. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PHI011405926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ea635358b80dd6975c5f593b1afc8848bea22a2b69e82fd282fb9fdfd41c50. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PHW019800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f96e07c64596404a4ba684f0d91d3d9cb8db7c3811991719f369b8390c9fd4b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PHO010300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f5b339126cbc4ecab01f5e6bcecc26790986e2487b56040084cb7cad1c094. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PHO010300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6345dec7b4f3c8e53317465883df52f5c788cf2e4d6e41bba68d3f523c51024f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PHO010300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29ee0984a8407f03b3dac46eee87c8075b650ba75ae6eeb4c2d2b5f0592b9f6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PHV021011289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5746152952ad96c8f7893ead200a4606f53c5c0ad0308b6958f690393b9c95. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PHV021011290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652252337781b5b4cfe8d476f9fc32b52ca19e1c0afbb4cacbd6168b510910ec. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/PHV021010066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353704971d6339851bee9ae43f967a3cc26ffa81ceb8dd05d464f0a1b8ed7684. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PHV021011292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea908871c4fa33831c79ba8e5f16914b472a0683b56fcb4a3677c98ef90a3f45. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/PHV021011294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7352d71d95fd53e1173db5b8f6fe65a2a9f034ca80ba810b361347be79b662e4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/PHV021011295.
Side A - Only One (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc75f085f41337c4798abb17d9766f5f5e83a36228f64d23710be36534ce0e80. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/PHUM70900199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b518985cd560bcce098602f377d67f4c230493e2e8ddac4b5364cb37d965c9f. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/PHUM70900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0195296ec6da3b7ccea9407d503f2c248e72ee59b364e071d7e2e70fce26a646. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PHUM70900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ddd4f8d30ab2e4216a8007daebd427318253518770cdb4bdb994e670644d4a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PHUM70900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd710f58f4f04364cef4206df64aba2990c0570cd529056357d7e170890b894cd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PHUM70900209.
Side A (Vicor 40th Anniversary Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768f49a48489563ff31219644fedbd33f93f74b0a409025c2a56b4753238e707. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/PHW011600349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5254912341662c995b300e76dcd07f56a5dbd753e50b8ae8967335112f316b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PHW011600350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eca1cc9f9b46a53bc23d7fa141aad1ef76a11c10d391be02f6d556fd694518a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PHW011600351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd703ee8e09219bfb300d98abce078c5e10251d117873b993ca326b6f94cc3d2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PHW011600353.
Side A: Vicor 40th Anniversary Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5816bcc46ddac75f7d52c06ea2e3953ee9f63405bf1e13cf794a4aeabc62f3. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM4TX2263232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e8b6323258022a9f862390afa9c6208e6e5b3cb114f9b58b76e51b21c4b9bb. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMDA72201268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ddbe4c9e008f2936604814291c532cc9b4572ee2c97f9d41dcabc218f38c9b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMFME2350073.