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 0x0acdf951b19f5a5cc6e349537852c92b276984922a99fc86e9513513a9741a65. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efbb1760-ed9e-4795-b83e-7ff9495dd4e6.json and https://artists.proofprofile.net/proofs/artist/efbb1760-ed9e-4795-b83e-7ff9495dd4e6.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 0xec16436a8c574f5c378bb07873a86b9fcfd30a4a833ad0c78bfa2c5069f14e6e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:47:28Z), 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/QZEQU2248704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ada36667f529906bc11230c8d501f4c386154d5effd8f2c32fe0538386bc26b. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ESA112429588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107f667fdcd2ee91febfc4a209a2fb39892089f4fa478d49e3850988d2f0a250. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:09:19Z), 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/ESA112432908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8561e4108f2087afcd1ea377dd62fd6911038165ae01e9bad059bb7aa1e1c08. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ESA112432909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb8c886b6321f92c1eeb64197db91cc52e4a8950a00aca6bb33c4c75a61dcd9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:28:09Z), 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/ESA112440954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7c3ab898eaf36ab9aa8e913b50962bf64eb3d4e7ffe4e78e8078985805a80d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ESA112440955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106384d54e7fc3302870890778e8d0b4423fc1e8cd512e14a769254e37cf049c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ESA112450148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb3f8bfad0b68949155c7ba44dde86d419cbe6e5484ebd33262e169250961a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112450150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad643c62167dd4f882045b3f340629fce2e93e21d7d29259d8318c19b71af1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112450151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c6d5ef94b8c0c3f8441888c842fd9068bde53455c92ce238a6fc3df87bafa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ESA112454734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc50fcc21fc52f0f72fb0607e96f6d145a15eca71044af98a1073d91ed7d18c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA112454735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e8f50ee01703548ed2347247d219ed820f29800634a1a18d081af16e11d313. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112560869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dda8c296a16a248a5a2986d494c134ad602765a097d3825b8f1bbb045a939d9. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ESA112560870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf547c36e2b66a49410448ea284e4b2dee7513c471355d53f4b193457b3869. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ESA112560871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9128f558f3f7bc7cba244af6cd529dc099ab2df9f33ca62a2800fb1e6c0dd94. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ESA112560872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8663fefdf226835feba63b7d4de05107037b727a5449edb34babebf663390bf7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA112560874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9065c51a7d641a5bd53dbde1190cfdf99d6e4f0d1881cf6efdb47475a0ddcb29. 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/ESA112560875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40fe793242740edd254b8a08fd3c46784d4e7f28e7263529193bdb3c1ad879d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA112560876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b81492954ed640cb29a45ef2791897cdb6b35f723defdf8473d6851e3de8d82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AEA3A2553432.