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 0x9b5a56ab0ff4dfba0b4932477f499599f1535e8fef1d6cdb9e69ca8ab514201b. 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/5a3a5dc7-2a5f-4df7-b046-7bc49559abd8.json and https://artists.proofprofile.net/proofs/artist/5a3a5dc7-2a5f-4df7-b046-7bc49559abd8.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 0x96b2f3e080ffa0e468a5ef0be7fdcdada4371999f14bd9f603b81fca997ecf06. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:00Z), 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/QZTRX2564294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ce2da1546a0a81041ed77e9a8c9e4722c31778f2433d7503bc13bdc322b013. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTRX2564158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4636708fefffbd974c939d5a390f2b661d65621d8da0a8abb6ccb4df7b1a67. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTRX2564286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eedbe3087716d3ffecd23bc39d96698a2ff4e6438dbe3ebadc30cb5b084269. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTRX2564068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577ec652aa56a206f23a53af2417308d0b44c9adb76f57be1e7a01133ca0811b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTRX2564284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe26ed8b8b86a04e24a72c1f009bae534e9d8095c331d624501d1b87b4956a2c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTRX2561042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabec350e82b8b2ed4e9953b3b1e40fe34f741807d5172fdbf97743ed57df3e1d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTRX2564248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a51fb24378f4e79ee94f28df053a232a7b5070cf394b4b7fc67f801dffd993. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTRX2564254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd5e2a60f61201d610763ac6329a543964eac0882e5ae9c75a81368ef272e9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTRX2564235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3ab3debcae60e8300d1cf86a1dd1757504ca532775e9550f509b829b8318ab. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZTRX2564266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e7d5aa83300d208fea56d0bdc0edbed5dc7ba09ad6137b5b26460b94c9d74b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:52:59Z), 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/QZTRX2564247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751de9e905118f35fa99e69b5c1a25e85e1489406b9b559649b90131670a6c6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTRX2564272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057b35cd68f73d1fad4c384adae26286eced46c82698335cb6ed2dd0ec36ab7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:41Z), 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/QZTRX2562973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c679c3fd63e3b0e938fef94105e48bea6e78558b27c7a6ceb174094ede3393d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTRX2564147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659cdd4aff04913a93ae9b90019dfe88bd4623d252edc3974bbc4a61d4baf914. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:48Z), 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/QZTRX2564196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63c26699534a04a22a6609cc348c17bf065749781e1aba0c295955a1abfbee1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTRX2564039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0597a0268a8f57094aab30839b55eba34c58d321a3011d30735c2d61897c075. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:48:09Z), 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/QZTRX2564122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f0e1eef268d930fbecc6f091d8b0289f6e5c5bd70c179719572d64ac97c4c8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:57:02Z), 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/QZTRX2564296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9a83e4147b34f7a75ff5220eccc3a0401577723927f456cfc80a27af1b9af7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:56Z), 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/QZTRX2564170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c64ef83ee1bfc05e40620e229271852836c7f2d78b465aa9fd38da740a73969. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTRX2564240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602cba31386ec9fddddc1353fe00845b7396e2bc0aab5773a21aafd0e74a78a1. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTRX2564231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d62d1049eb2de6beef89412ca0aa4136163a6ff0672c7833f45d6fe1e825c2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:48:13Z), 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/QZTRX2564251.