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 0xd0dad33ef2b3719c65e21aa32a9b9c43a6cdb34fa93d4aaf88dd32238ec0625d. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fc77628-096f-40e7-9966-7b826f9f6b50.json and https://artists.proofprofile.net/proofs/artist/6fc77628-096f-40e7-9966-7b826f9f6b50.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 0xfb2fd799ca17d9b2d483feb3431a04b468a31bb62ab7e47b0c9a24bfd23f8b28. 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/QZWFM2424806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e8fbef19a7066af14ec5f566cd76993177f137f2e7433fde94825f80e7e90. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7M2469755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2919decfae758a258e0f9d2dd2833d9c732d16780dbe2895c3b5b255b8a1d38. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:31Z), 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/QT3F22456556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2d09b93233fdb831f7708fc920b95e6373c13b5209eadef010ad9cca564974. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFYX2530353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71564fd2f764c53b44351a7631d54996279096565568d702a2f577644b0bf93. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:03:42Z), 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/QZFZ22573163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc04448eaf7ea3fa5e59ede0af9e534ee6347381dc7fc5feb6313c4d1f62c95. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA62583108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e12093ea27307cce5722806226bc152bd5c403b4dd396411b5f0353b8941b56. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZES62534068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae5aea6d42238cdc46ad58f4cfa5d4e52ea4b482bcb55d66a9bd68689cc826. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN82536380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50c9535e0901303dee041d77a76825295d5d55bf472e4d1081d53ed11558ec4. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZK6N2500709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e509e1102d00c0d0b4a732712f1d076eaefd7c92995b14246a74c6ec7abc21. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6L2590546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d66877e1d92ebf31908036058bce321822409875d9ad08ddc4bf0625ede0ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2507783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d8535306ca63e8ebd014e3fc77b8fca18b06c5decbe734ec0c4cfbab02b899. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:30:57Z), 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/QZRP42555504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa117ebc8fd8d38b4608063ef815cfb2bdb7177aec3aa6a59f68215a841ee6283. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:16Z), 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/QZRP42555505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efef2219b2b5b2aba3f559c50872cfbfd0916f6add8240820ac20a000a29c2b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP42555506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3347bb43c181393f7c18accedb5b3dcb501c761a7ca6b551b43f8db55d990ad5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP42555507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e5f771705bc6fcd3aedca656e7d9af6ce996633eb1f646ca6c53345a1768b6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:13Z), 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/QZRP42555508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b15aa68a512363ade39f10a9f2262eda5b5bd1de5e60036c523dec32c198cce. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:52Z), 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/QZTBB2599508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7abc2c902baf946d7478a5960a48daba65e60793c82386f52088233f82152af. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2534399.