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 0x28ee8e52c1a9ad7dd73f41b2a5f6771a88161f7d3cb3cdd989814023b29de3f7. 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/fb580aa3-b79e-4e65-a731-4a1d597b9b6d.json and https://artists.proofprofile.net/proofs/artist/fb580aa3-b79e-4e65-a731-4a1d597b9b6d.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 0xb517d1dc0d92b86c8ffbe313fdf830d9112e77a1aa8d9f5ea420c324a29dc962. 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/QZK6N2314016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511cb09da27fd45949e9a0c84f372a5dd50deeb21757a1266f855bc3354c6b47. 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/QZMER2130785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed89664d423093db02df5d5f79c9019bc88e265d37c4e95ab39ba9734b63ce0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ52132327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223c7d604c2353748e4bfa74ff38f5fb1f27084f6849d2bb4f1557f6b3d48132. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2166213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e611d0ed90ab5248c6fa2aac30227e1b4a9cc5639374c2ba5fd5b8ef10fa149. 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/QZPLR2123727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1112da2e18fc11694c46b3cef387d6fddc580d080a6fbc84ff4c3b623d0d3ba4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY1995974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52a6cb5918c9c65f75dcccd6770673500cd0351c181633e3bfbd141358b0bc5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY1995975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2484e7a99ea3d4d95a2fa650f89a21ddaac65c7a44b7cb348f31e89a6d1fa5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY1995976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800dcb9a57bf79453b19230e9aeb21b2760ce699e1cece6ef6351350ce1f041. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY1995977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580071bedb9ed2a8e7b9f901d27763b60aaae2807cb8d9991a083f6b807bb7d. 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/QZFYY1995978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e028a489e72555daa8851d4cecf689e0afd89c6627a29d0a4d2935d2cfed70. 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/QZFYY1995979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd866e614b63977cec6343e2c845612b43ae6909ecf6649f89add432af6bf9aee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY1995980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51fc591c0d08514e633966fb974091d9ccee1c9db19fcc2218c77486a749477. 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/QZFYY1995981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4a2c0ee9f0276a001a2775b2b13938a58d8cbe1b29fe3b4c7d75cc78fbd91d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY1995982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9ae9884dd0558c813b4346a4e1a5f9bc99e67cbf95cc038e01d264ae2a0e90. 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/QZFYY1995983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93884101bbcf20ab7e6a0ed8df6110f231e2fdc714f7ec77f8397579423e8ee2. 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/QZFYY1996367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21c6e487e035ae95854d55ac50a55bec8f38d3ecabc4169b930c519b322a47c. 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/QZFYY1996368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7933145f41ae9f801c1801a3db9da67269a7e164cc67cf997c12a11e3825a41b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY1996370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded5c082b24f627737bcd192cd669c11e163546dca1f54082a6b7af8c4cc7da9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY1996372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2da63d500d506cc489f1ee2bf361164b7182c1d7e9b2e03346975fc410687c. 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/QZFYY1996377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b749a5cf81a892ccb88d186dd6280b618517d896a19e4176abe7f5fd253396. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY1996378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcf9cbedf4d3f64cc7c81c20f3f15ef120c3c9356bfd700c19ebac1d327351a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAW2296645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e611d0ed90ab5248c6fa2aac30227e1b4a9cc5639374c2ba5fd5b8ef10fa149. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPLR2123727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d166228e770e13da7190ead26ae3727e131c41dcf72966393207415ed2db76. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ52134279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1570938dbacde1527710e4a1ccfc4a49a253d4b834d61b2a86bd64baf19bace9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA62090781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6394726128252e7864b34704432381a95b74f6dafcf1d1c5c6040b42a99864. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ42039737.