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 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 0xd33afa55b84b77dc3a62bd9470277245e4598458fc911141410b2bffe457f571. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/086a1a52-404e-4ad2-947c-daff36b37e43.json and https://artists.proofprofile.net/proofs/artist/086a1a52-404e-4ad2-947c-daff36b37e43.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 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 0xeebc8d00d9d1f7b3b4ff2450ae5e2d2d4d799abe6d7b7c274a5606f75ae109f0. 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/NOHVY2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6c2bd2e9fbd9fe4c3231dc6bdc4765976983a59f7e5ad862ffec42682cec7. 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/NOHVY2305020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd200cb6285a0d9c0e6e510f7461e514d10c7b4ad0d5784da24d644a56746db53. 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/NOHVY2305030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5990ee53c38fa1d3f48d6901b9605693bd9f9a2c98c36472b39f67fb67198cfd. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NOHVY2305040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07da572c25618faa752deaf87875aa569208056c2bff3d275236d48f6059d35. 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/NOHVY2305050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bab3bf0e738f4c9aca056776532940808339ac50d13760f4976e62f89337225. 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/NOHVY2305060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdf7f14e1f500de1b5a1fbb96cd253704517e0b71c6f1aebda693ff50cefdda. 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/NOHVY2305070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57da6337fea77396d292e7e06ed1965bc1ffb08db71abeab6b73eb81b0013ceb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NOHVY2305090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59877305272c25533ccecd3212c80beae3a22a011210d96ebba3d912300a4961. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOHVY2305100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a86a0ffc4732ab2dbe7a41f65f318218fbcb5c020ab9b7ad5ad606016db84. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NOHVY2305140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840af2425639deaae06402cdf87ce0cd442a71eb76f04ed3f1d9839655a2910a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NOHCN1703030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a516061c43b2e1788c0ee0829e52b7cf226c186d596050e434cb6749110f4e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOHCN1703040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00962a568b51cf6a790eb05d189b93b8c17d68bed0a6686d07b4c7cc3cbfd71f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NOHCN1703050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc231f98dbbe69d68d3b3b021db299f6af0f10dad72bff47339497bb0e5fa8227. 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/NOHCN1703080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c22cea91b31b50cb33666c6662486385b28ff5529386c3ae6184cb8d83f3628. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NOHCN1404060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8f5013822083115797145bb984be56b330b347e1092e8a0562c714e7291933. 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/NOHCN1404110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b723b39848206e7fd96246c932cd2e323911732cbdc9d1bdb017de167563b6. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/NOHVY2303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f4e6d756ccd33216631f3e9b3a2cae550265254ee4e84fd14ce878e6d77728. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOHVY2308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3361f47bca445381bfdd72ccc1cb952e24870faad0396b2f8a6ad82607a584cf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOHVY2308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a384bf36c2f42f262b6bd6df6763b567f78a1dcb6dc2bde2cc5687c4eccb1c. 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/NOHVY2308003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58872e9fba807b0597b9da102a3e9fe4f85e7cb6c7a093ddff96687373b72c3. 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/NOHVY2308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dc44c981a1f39c6e0dface809c23080e8917baf4a552d74a8c56dd5f0074c9. 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/NOHVY2308005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf35eb2a72254228fafa496afb5ef546ac2f605c42ceb15cc0e0eef858d5b29a. 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/NOHVY2308006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2787573c072cbcf4d58a5e31273b0001d5f957c087cd5951c661623ddccc84fc. 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/NOHVY2308007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60385f8cd93d392aa0fedf19bf46ac16fea73e31f0f857407f3a9e50e19b423f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NOHVY2308008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b972a03818872a07c0a2fcd6f1c0afeca13378e05e91f7f5453b329e113f84b. 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/NOHVY2308009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9323e6d44c3f742f6afeab3a78fd9e0b3b7163b6914f933afc84dc2ccd5792b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOHVY2308010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cdaba45d4c4c0faf078d6ae8ac9fdcc08dc01ff73b4092ee015bfdbca8163b. 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/NOHVY2308011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434dcfe9fb9856452c1cad2b4efcdc88808d526935b8540dcda6cb096a69422. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NOHVY2308012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080f6b6cfbfeeea0f97bea6028bada125ecf09359438695bd49aea7f7d5a06b3. 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/NOHVY2308013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b10a43aca69728c6e6a4a6c8e3deadd203ebf55d06187eb478e9d0ce4d1f63. 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/NOBGR0502100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3361f47bca445381bfdd72ccc1cb952e24870faad0396b2f8a6ad82607a584cf. 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/NOHVY2308002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a384bf36c2f42f262b6bd6df6763b567f78a1dcb6dc2bde2cc5687c4eccb1c. 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/NOHVY2308003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58872e9fba807b0597b9da102a3e9fe4f85e7cb6c7a093ddff96687373b72c3. 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/NOHVY2308004.