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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc0147aa278bafbdaecae7965c932a5669e430efe26c90c1ad27157770ba01. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/669ed513-f607-45fc-b319-fad8686a85d1.json and https://artists.proofprofile.net/proofs/artist/669ed513-f607-45fc-b319-fad8686a85d1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad073611ad7abcdac3360013238fd5526d54f23312642a93a140ed9430d9dc4d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEVF42200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc68da259ef956753c723478d0cebe522dfeb27109c241d5ac2987742466dfd. 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/DEVF42200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa5641e77b371e6107ba4abf35c97ea73816f8e6ba02f685ac4745d24f9983d. 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/DEVF42200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed5bf0a714e717daad275f2d241e470661e93e5b22cc7f954da1cb1baabfc9d. 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/DEVF42200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373bc102d0633c2f70319abcb988e964c4dd62cfbe7f07ec25f3b81a76d6588f. 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/DEVF42200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365c59a2516c730dbc331f6d514772f39d42741fc8364149c9e5fb833dfc9d5a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEVF42200141.
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 0x455a12dc0e13c011db6b562a1b667d005c014757c42c438c0b6ecda00b2bef32. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEVF42200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e456b2421340a7a50603034e4ad28ca9b8f8918570bcdf17576162d769f1f. 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/DEVF42200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f95ee49a58ebb0718957b0ee5bc91a2d507a375fddbbf4ffda894e1afd9d6a3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEVF42200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30a2d267cc24cbfcc0f680a454f0028995a7d55ea5ddf4634ec1a2f2826e4ef. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEVF42200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2a433b8c5efc8c63e61a6bbf23413ffc0592208d43f276e3b358c72b3e3dd3. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/DEZ651302626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f0f2aa31b17f0c6202931d0a4cfdf11432d8d26af528006c20c11778b8858. 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/DEZ651302627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5278f504e670d7e5700848fbd42f5b2d2521cbd40447821872bc91db85213a3a. 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/DEZ651302628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8f70a9ad17534168a39bbf0216b17a3c337ea62a4a7a0460d0bd3b6e9db9fd. 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/DEZ651302625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264fa03d321f5a77d7cdeba82df6c6b18f25d1d306e222b204a0989221fa216. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ651301512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10b7936607a95519ee8272e89bec19fe2aec1c128414999e84ca9f05ff3b8f1. 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/DEZ651301516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de26074a579d1a6ca083dc4bbac5fe0b053f0f4377edf24363f897a4a753e5f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEZ651301510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b929fefeda2fefd06bd13afb3e80273e5087e54fbf689c9438dcc13caba587. 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/DEZ651301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc9296595eeffc9084be21f1cef373a69e9c77e5d88ba9015cd094096c90bbb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEZ651301513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d93a1acf9c019c55068f1f86b283dc2f8f7391670fce49d54a96944d48ec777. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEZ651301514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91053f510e014e3c3ae59a4e70df7ea2e71df1a2d274e2388b56624c3da196b0. 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/DEZ651301517.