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 0x8d8934f61d48cd016305122f5dd68339ae93e6d59f5994f1b51e1dee8359a355. 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/4f51a7fc-a047-4119-8c3b-f598e0bea9d6.json and https://artists.proofprofile.net/proofs/artist/4f51a7fc-a047-4119-8c3b-f598e0bea9d6.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 0x396f2ebcb08c0fba64256189fe1394e725c241e523b552588b5b78b2c2fe6444. 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/LVL152004382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5840b6aa0501d287a56a12f4fd62317083dc23abc6d15e70569526184e816a. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/LVL152006230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb13f04a514bbc8fa33c0db5df7d9827446dc1d8ae4f45ec278fc0a6a832d52. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LVL152103923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37e1990ac6e34ff42f5d050568728ec79c1502364104f8c664cc96bff50ea7e. 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/LVL152103925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe565463aa4eab78fb95403b4372729e5518428a1cdf656e769b03cc5b152e02c. 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/LVL152103930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74703320e47ed3deeef67ed8314dbe7bb854e534844a96d47022826a49d53a27. 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/LVL152103926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3783a86a820285856dda1c33fdcfd9b2f9b3ba86190bfc023824491cc588879. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LVL152100818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ed8f1f1061082cb8597f48b3c60986ba48ae0f7153309ecdcfff906f9ef8b. 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/LVL152103924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c408e9d723dd8b78eb421017b47c83ca9d04f5b687323548566459d644edc05. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LVL152103931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a3bc739e9dc1a6372698a45768f41c9ffb817d434b90850eb30c27ef66078. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/LVL152103929.
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 0xe5eee5ec81a217d8be4b5232dcf4c8c33222a87f0a10d00bf30fb71918d25807. 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/LVL152103928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62f2bb0efa467f802340bbb8da50f00599278a645333eaba776e913873e4572. 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/LVL152103927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3967deed4fb24206e6132e511b887161710d59d30b6961bbb7857c8893aa5dbc. 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/LVL152302222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910411456ff2b5a47ba844f5fde4903df531e20c696c6c48dd0f32f63a0a1ec. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/LVL152401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f92cc130f3d747853709edcafc3cd74dd19de524f282746311c91664ff3be2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:41Z), 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/LVL152501755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2b0b3ad942f206d08254f83fad2b24e3b2d994e68b4c7aefc64c11a2c00702. 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/TCAFY2152322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56620709f053867527c41c54eb75dc10e74ea20d19002b3a1d0411c5dceff431. 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/LVL152402369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703a09f5d00f6292d0b680eaaeb6233fc37490c21d47213aa23bc60e4a480423. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/LVL152003948.