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 0xf3d9f83003c7aeed12f18e724fd6be30c8323107d3c2bb9f6a26e0f9f353f89f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cff0056d-4f03-4334-9235-c6b5c036f446.json and https://artists.proofprofile.net/proofs/artist/cff0056d-4f03-4334-9235-c6b5c036f446.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 0xb49b8ae4edbdfaf6b5f46ae1b742c2169bdb7f2d57dacb4d97a29d959f9094cf. 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/GBLFP1890191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc84e7fa8beb3c07fd04dd0d71c867bf9ba3f8eab5c08a3a111e12f8cb9a547. 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/GBLFP1890190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcde0c012929f2f0b70136f3a9f23bb3d38b2069e4f1dda30ebc259ff1e730e1. 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/GBLFP1890194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d12d2bda22be11f08b711bbf2d40ec12d6777bb66277518b30ee46e58b7bb. 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/GBLFP1890195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4413eb4165b9f0c7c6034e23ddf29c8d607d00218b5591fd8937d1c0e61c7ea1. 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/GBLFP1890977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513aa9640b0a4644b321cefc3673cfd01d1312f8360766b715348a3b9d830dd3. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/GBLFP1890198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628493b534f8f8b0c2ade757740cd2b1f932972f2225bc0c9ddfdf4fe3260f22. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLFP1890200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389d65456906204df708fa72f0f08fd32d26abf6cfc726d090fd4b507e7e1a9a. 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/GBLFP1890201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda968c03edec8c6bd85345eebd0328604484e1fbc822b40ddd69e2b42f4afe29. 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/GBLFP1890203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b2b5871f4f9e0d28e576f565074cf58041e9dda2aec86b42c3a472bb7ff98d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLFP1890204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4657ef1e4b339fa2291224403f2980d209bf130b20b0a5a243bfee240e36478. 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/GBLFP1890209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23427d7926804a435d153f7e2665b3353d6e796dd9597e2918c4df94b4841a0. 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/GBLFP1890213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1f682c69b75941ebacc6c535990f40e7010e60e4cbf0d69af828fbe7a52442. 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/GBLFP1891802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde92f10db07109e482760d2d0203818f4ef88c1e458ac3a03ed903e0839be920. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBLFP1890214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde18ef3035626f26714eabc9e41c16efa2eba500859e5395d2b9ddb2168e520. 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/GBLFP1890216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d7d45cca7b81e58501137eef1dad2df0b05447e4c55d7bed83574d5f5ab5e5. 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/GBLFP1890217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba99bd5d7f6449f1ffc5802df5609afab046ef2c6f071d2b55d48202e85aa32. 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/GBLFP1890218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e7c0d43559baf898b0f6a87dc4bdaebb3150767f45045d6a0ec0b4b8ac6f1e. 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/GBLFP1890219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce1217c7bb7525e697bd302cd75f20242eadb22d5461c9165573622a403fd2. 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/GBLFP1890220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac33336a63b30d7e2e6296f07e2273ff807fde1285da3c38e321900bfbeeb0c. 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/GBLFP1890223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc6e9ce962751f6d651b44c9db01ad48ca6aba0ddb860ca6fd55f29f687667. 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/GBLFP1890226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8433abb6d14f814ca8bf03001027ec2266732e0480ab4228389f4bee5b956aa6. 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/GBLFP1890227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bcf23b0287aebeb932cae05aaf18b647d3cb6d5c0d071d9be6241e3f52cb0c. 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/GBLFP1890228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a67b53098b5d2fde8283460f0fb5f2038de31bce1220fc950f3a76bb0c5e0e5. 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/GBLFP1890261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182e884c504618aa1021dbb66ff3de93c8d1d4c74ecb5bef2149dd64167b42af. 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/GBLFP1890972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca448c6453acfc5cd3a18cec8c1754eac26e7b276124d7e0f4dfdf2716b54e23. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLFP1890193.
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 0x2f079df1cf80d3d55e28530f65a7ebd0563189983b0833b8ef7ab82924786323. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP1890205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba9685511e826f4ca88293ecfbfc17eb7abb8b4ec2c97ad59bfc3a86e922551. 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/GBLFP1890207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9543e579546e1b491d3661098100d08748a23679a6758bcc946674167305903a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLFP1890215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5d2abc6c5cb07d21beb4896942dc0cb9d726a6e85ed6bae0988030b1feda5. 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/UKTVF2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ede5e1f50a7c7f1146b31988cfaa23eb227731d6581a0de62bfcf6c233de0. 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/UKTVF2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dc3e86528f61af8778ff569a61cc124655098fb0ee4ba9007a08f8477884c6. 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/UKTVF2000010.