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 0x16357af1dee43ceb137a9ef49f444797288e313592aae915a53cfc9269507669. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef79ad5b-5f40-46a3-a831-a651746edb36.json and https://artists.proofprofile.net/proofs/artist/ef79ad5b-5f40-46a3-a831-a651746edb36.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 0x1965cf0bb92b4e098786f075332b2335f299229f2622a0efbb4205da0a91be38. 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/HKC371858673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ebf1ebb605b89b70a66747627b53e7bedd2f1e64ec8ea2aad12e1e21454017. 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/HKC371858675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd913575036cfdd86072d0bb7c0c9afa39913ca76f833726ecc656a6b3f672c57. 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/HKC371858676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a630c70d69eb640f57ac3c4c95bcabf6e812b4e2f05b6ef1176dae1ddfe9ce. 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/HKC371858677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa47a73ea1ecabff03914553cb5911117d2fdb5abaf855f6cccaa5a20e7973c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HKC371858670.
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 0xea4bf1ea87c4319c0cbc8c7075a458ca95c9b01dc59dbdf8d025dd1664f5dafb. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/HKC371858671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907a5f8fb0721fafb6629c1ed631c6fcf957afec232adb9d76bdaa88301533a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKC371858672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a65aadeb6c9b5402f72fdfecd28be2f8e7cf0be7a48ab83c5c95d23a1cf7b73. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKC371858674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0c2767120a68fcb56c7d688efa51988a676f860df09cef723c2f3200b1f630. 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/HKC371801103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e1b6efbb3484190814f3f4957b15509e8eb1fcbd3d800762723007d623ec2. 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/HKC371801106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116492a77e20539bcdacd8b4f2b3a05a38a6f1658ee2010a8d2c3de21d061faa. 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/HKC371801107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8cde5d01284042bd8b5ebff7b5721db4a2ba354ecda810a3b408862e646a16. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKC371801108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013976194782904d382b77c679ec7a4661e4a66b1793fccd22159faeb1c2254a. 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/HKC371801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9ff823c9407b9eb9abeb48d4b26622926a0b7c6a802b3645fe984b439fa297. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKC371801104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0572f2905a6d6030a0f61286d7446e3b2ad12c2a3f7738b286932c1727a84. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/HKC371801109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63903e2959ad21cafec6bb482a498ce002dfe91870e4b4e8764d991df62eaa7b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/HKC371809049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7b191046f84ad256efe9548f885b335b6a479d9ad3a7f575a1345be773de22. 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/HKC371809052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6569d8ce80382f197a1d213132f27bab5594075e03ce1cfc354d297534d18f2a. 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/HKC371809055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ce16d8e55d4f070d026e5e3f1de1a4fa1568f7337a5e5d13acbca0096e144d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/HKC371809047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fdc6bf2b234e04340c0db207fcd362c1776101e68297a25a7255e193e33e3a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKC371809048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d0b2b72bbd9e59fd71ccf2f0e464eb0e70c8b592b0a117822a6f8e98fb1b0c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/HKC371809050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253129e08495af4f5c00fc6fe0f0840c802cc0fa78cb59eb9f28f0813fd41457. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKC371809051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4158ca9554a776b91d7b49bcf7d2e503860889d1e01231f4e733e885b6e9baab. 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/HKC371809053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbfc158ab9c6bff3b3c7272c9a754ff94a71049cee204ec3caa78fde729054a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKC371809054.