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 0xb1193d911b41075614b4fed67eb337bb01985436985950ca0599a7aefbfb6184. 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/4cef4af9-fc02-45ae-a8aa-a4f06f6f7627.json and https://artists.proofprofile.net/proofs/artist/4cef4af9-fc02-45ae-a8aa-a4f06f6f7627.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 0x2417a68fb53aa347f81968fb7c17bdea9a9db7cd6ea8080ace72e5edfebb318a. 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/MYLR11630061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c3e0d1c61c61caa7ccb21f54e71dd7c06bfabba79479dfc2dce4192d548d66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYLR11630062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a07a7b9642bf6c33be07f0b66d06a8f26bdb5eabb3d1572156c786686b1a49. 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/MYLR11630063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd1b34f6b42b664aa8c30b68097cc6f77c9c716c8c3688f3790f0bb0b52f23b. 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/MYLR11630064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2bc764394355e4c97cd1c8b627ee0c9a09eb6fde98e7340a912f3385c946c3. 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/MYLR11630065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f9a7edb3ab0457fedbd05aeb47377f84bd4b290c9bd2ba67bcd0538ea7a10. 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/MYLR11630066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d7c4a60bca098a30419b58cbedf32bd1bfa2da4e06890dcbf6612d06b9fa7c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/MYLR11630067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c1a0740d018090d9cb2988f10800ff8c5d4f3c0effd18326562589cc52ced. 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/MYLR11630068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc34a55d788c9fe163be5426fc195af80749ebdec667f030d0919bc29a5be4e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/MYLR11630069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8077214dcf62723c55921ada1eb2606db6634ef3ce8bdffbfbdd65d25dc495. 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/MYLR11730051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd491366bc7ed562779c3fbb0e4b8182421d598f3bc1de26918e59fe0da7badec. 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/MYLR11730052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae263708d57f383ec0a7c261c81e3388398d5484dc7bf44b525a138a5c865e49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYLR11730053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe751e7ee574c3042e32c2482fdc9d518a019c77e951f431f40012b365ed3b989. 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/MYLR11730054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea42fa6fb0145f8c2d4f0cbeb287e43a25068f54fecdc05fd9b691b0287d7b74. 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/MYLR11730055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e00ef09d516cc0b1e2e5d538ddaf483e2ea769a3e1208432ba15fc5724fa23. 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/MYLR11730056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2bc764394355e4c97cd1c8b627ee0c9a09eb6fde98e7340a912f3385c946c3. 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/MYLR11630065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4e6f8705d3249d7b9eda134355422c7f49180fe3a9bc99fdf8956083f35fe0. 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/MYLR11730057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f6fd1fb69654d2047ac7416ea83bdc2bc17d319ec5d7666758d69b5a4c3a7e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYLR11330791.