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 0x8404c337e42a9cbe8ad5e4427d917beafba11800c847b47a9091c2b1c4c9071c. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8688227d-825d-4418-981f-a462ba77dd3c.json and https://artists.proofprofile.net/proofs/artist/8688227d-825d-4418-981f-a462ba77dd3c.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 0xe8f1652166d8fa631d6a639cb07b6fe7c01c08ad9db7a347f27ebea03a8aa3be. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWU2205678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939690af386d10eced7602d09504ea2da8fa3dd806619a3b25a323a7a22a7fe1. 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/QZNWU2205679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12a8c5b6dd3c63d081a26df6273b7934906e13bd25aa8d15f98c6e446ee60eb. 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/QZNWU2205680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65246a68b239e39184e6ee8931cef296a413a5357df45a86d9e4b46bf273673a. 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/QZNWU2205682.
Public Service Announcement (Ik Jaroori Jaankari)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f991ac4010e22846ba5c811e5f21da9ebf391936df71e475b03768dacf504b. 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/QZES92453409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447162c25eebeb403e6566bcd4221dfdcc1cefcc1f42323176bfce47a392a0a8. 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/QZES92453410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac4c5ed3a02fb728415135fea6cfff300cf5ed29dbace5b111294a32b16655. 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/QZES92453411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb44a6c48af6f385cd3295c3458519c55282664c42da75d46dac47dc99a9b4d6. 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/QZES72487301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3d58dc5f9f0ca740d77b80fce48f3a8c53f6647c8e236c83538a4a5324962c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES92453412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84eccdd1370bb92bb1c869b9ae1d5a8c774f05058f268444bfefe8a6392412d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES92453413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb44a6c48af6f385cd3295c3458519c55282664c42da75d46dac47dc99a9b4d6. 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/QZES72487301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00c3f5d3de5ffe34a652b8ee9ec6dbcd233fa9453932db53a6f98caa081eeeb. 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/QZES92375977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8334e5be10dfed7795a0b74dde66035180fc77380a5b1ec7d179af3a82e1596f. 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/QM4TW2355772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c8c1c8ff01f4a5996d403c6097b97db91aff65d5728b7584480c4056aa24d9. 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/QZK6K2488816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ebd4335b811a334876e5e7a4e345fb0d95fc38964b851aaee8cd778dfdbad6. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6K2488818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0cea78b0489700a0d32384e47920315875061c88d7979837122d5f3c18b626. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6K2488822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef11234562110087e75997b8ab489a32a2ad5f3da1dfc7337f8b8b28905ad51. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6K2488824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3758ca8af206b9124c04986a372b10f92ba895a4189062196a5481ec2ecda1. 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/QZTAU2241803.