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 0xbfa42cd204ff78186fb907d442ed2b8831cf91f4269208b4c2562149f6ca6b00. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55884df9-9951-4ed2-beb8-7390f796165c.json and https://artists.proofprofile.net/proofs/artist/55884df9-9951-4ed2-beb8-7390f796165c.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 0x835667e5e9e5cc6258c61207b37bf8d7c160bfde1f855591cbd8ab84fc5d746c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZBEQZ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc33a2264d5c26007dcaa43b25f4a74cd7c023cc963d889639746a4b766b893. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:04Z), 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/ZBEQZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833124b5656523d324ad96383db7e79cfbf584e2918d7c84f2c7b948d0d63726. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZBEQZ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e18843438d5bf8af14bcda96b62df217504433703bf18c11c623fed07f234ad. 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/ZAAKF1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09da1e7ed43b00bdba53f14bfc8e30cfa3ac5803914e11b7e059727c13503b44. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ZBEQZ2300014.
Freestyle series (The Journey (interlude 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f071d26866f53ea2e40a4cce8177bfccaa77395e581712b94bbb4dee28b9cd. 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/ZBEQZ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9fa3d4d35f486bf3a27bef39f22ef189565eeb95ffb071beae6b9ea5d8131. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZBEQZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7c6c016f73b8910b631730a34d818f1b53850e1efa2de8abd950dfc00dceb4. 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/ZBEQZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65418d7867bfc28e1bab9dac368f06a62d86592ac9ee5e0a49a53aa30c650f73. 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/ZAXH61700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8043bf4d29cd92e990aab419e8189a7ccf09bd78aeb4508efd9d4de2c9d47cc1. 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/QZGLS2470780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74e2bb503ccfa70956d9cd6d312d9d7df3246996806ad3bac1d05e4ddb9dd5d. 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/QZTVM2295814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fc903ad259539cb5c5d521e95b31219b1dfe74f09a1468279ff76cc916595d. 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/ZAXH62100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13edc6763db1eb028e3383bfeca7c0b8328026da07d159e4da777c3e0697b4c3. 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/ZAXH62100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98f26af28b13c50c4e01f0eecf1743bc9e450567ed8f2a09a45d46dcf8bd38b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:56:56Z), 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/QZNJV2418249.
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 0x44e5dcfa54a0464a704ed7fb0c149dbdaf641b9f152c2cc887e282b084b28e3e. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZTVM2295807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec460eeede363699dceedb507eaefb9899a98f3cef92433b929998a81ed7a6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTVM2295816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e926522a3faf5cc6f04845133c57b4dcd23b870f3ab7d9348d99c648ff9afa2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US7VG2473582.