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 0x50dbaf81bccd5320f333f04683ec1b8db708230270c0110ee0412ef6b83e1c48. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be1c68bd-7b13-4a9f-9cd5-21f0e0f3898e.json and https://artists.proofprofile.net/proofs/artist/be1c68bd-7b13-4a9f-9cd5-21f0e0f3898e.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 0x705edb035a65b2706e01c281a1d8a35d9848efeb78f705fd7411548237d8cba4. 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/SGB502223453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb21456c47c4210268a5ea31f989e44a36659bedeec4957aa14499d385f9c6a4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SGB502216740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ca0b75b82f4a44c516561153dd81e94d53d867b26212697c11dbbde0a5c2cc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZN882256202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5227752b00a67611f845b8686f73191f2a16826f46b01d342791bdb08a092a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZN882273181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967db2cc57b73efa52bd555e1933fc06e0078d50f4c5f5d06fe4097f54c88c79. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWDW2339247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1faa1c0671e96b75d6606e31cbc4ebc8356b2271739291911313cacc789f69. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZWDW2365962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd60445d6423a6bcf8e65569281ff043affd9c869ff8fe4653db8cf4e680f52. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ662310522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb926610962e6f7021a97b6f9f12ec5c9871f6e57d1f4715d853bc79d42cb2. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/FR2X42490612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913a8c7f2fb328096321a78eddb8a6a981548e7fd3e807b379ce9ca91baa8b5b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:45:55Z), 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/FR96X2431734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77910746dcad9b04e6f97fb741fec1103ef864ad76e943234410248bd06c99a0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FRX202442448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b98b4fac5a8d68ffdc69b6e465a6d2a3599639dfbc0bb2c2c1b42baabe2d852. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:25:49Z), 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/FR2X42505604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a66f50634841848315ab51f4bbb249debf2e5890f196a5e0106b90afa053c6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:50:36Z), 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/FR59R2500956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b98b4fac5a8d68ffdc69b6e465a6d2a3599639dfbc0bb2c2c1b42baabe2d852. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X42505604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597fd0b14ba264320d826cf6870c092e2ce0f5cd63510b459c42cf9a3e23a2e7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:31:23Z), 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/FR59R2500957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1ca2f1bb80ae7ff6bdbb3052cdcb9a1233220e1d4f112a3f119f557bd1a8c6. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:17Z), 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/FR2X42576668.