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 0x7073f6eca7ac1674818f9ef177c1dc9f480e87ff46920db033a16bf21eb94485. 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/bb98d05a-18b3-48e2-ad89-450ecc184dbd.json and https://artists.proofprofile.net/proofs/artist/bb98d05a-18b3-48e2-ad89-450ecc184dbd.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 0x94c644ac06eac2f6528f35c291cdaa22e37302573d6cf97abefdfe6a09c6ea37. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR96X1978692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84eb116876e4d93a1871ac66457563ac267980dbb6dc7bf6658f3ddc68012f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X1978695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33482cfd90311b944aec8baebcd669108d10f1488d850e28d56515680bbe73f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X1978672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03fcec3571c138122a23cb080db4f108951631cd30d98d929e2654e151b313e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X1978684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc72700fa521dba527260e3f91a9021c0b6c61d78bf9cf8408d4368e320498b2. 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/FR96X1978689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ed1f67481fa5358b04c021cb158949a6e73fadd3ee78f8564ff13dad498e7d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:51Z), 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/FR96X1978691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aeb5c60b7dc3c0a4de29758bb0846bae114d39876fceac1dff7aa948e0cf97. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/HKB120215228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1872fd556e5ace0c2afac435f0667f1eb964ee0837bb318889464485475e317. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKB129318168.
百代時代曲傳奇 Vol. 4: 潘秀瓊-雨港的晚上
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854e19e1e4e8a2d5584ac7b81761df022472c45ad1a5b40bbb3edd6d50a012d3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKC630780474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeefdbf9c1648697a01fee559aa1b90d18e63dd36fcc0f3af250c8887f6a3261. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HKC630780456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37198f4e8491298f5ffe67dc6d531498cd4964d0e7b4632b1ebf481ec508899. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:57Z), 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/TWAN70760233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474aedb5fd6bb543d94c7c8b6af8b159a13c1299531bf0958413d2c90e319200. 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/HKUM71400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a12a7a7262ce2d0d23930d7623438a3e8f4c4a8a88d93446a2fd4c980453d65. 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/HKB120520208.
百樂門101大上海夜香港4CD世紀珍藏套裝
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cfcad5a9d0ccc15898a1b745c64eb37794fbb709b5526dba2660501421ad47. 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/HKC631606595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7f328853a4ce633c9d5fb9e2e42dc798a820f64d44891d70ee7590cbb12378. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/HKB129318018.
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 0xc4accc7438a3ee8ea0a11ed0b395b84b18ae7767fcc9f2f20a3184792080177d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKUM71500954.