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 0xdfda05ab678d2b4e4ecd73f99e34da33890340a5e6d19297238ffbe1124f9933. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64fb724c-1ee3-4530-a0f4-967450108734.json and https://artists.proofprofile.net/proofs/artist/64fb724c-1ee3-4530-a0f4-967450108734.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 0x116a81c185a98d9e7b85dc36c3c989c0c03671233111a3194d6ccdde2169df96. 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/QZTB72238531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69e23b286794bd92a3aafeac893bc31bad650dbacfbba1173109474d749aa4c. 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/QZTB72238532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd115856b453318ea1fc7ee1e5a356255c4680c6696b69a0124b1d662ae2df056. 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/QZTB72238533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d1bcf115a9d4737eb1a6f669b69bdc7b76d7e382ccc067e4b17338c8d8908e. 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/QZTB72238535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5823111a2303bb9487ab8d676e58b49192dd442f7dea74f04adff18b89175c03. 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/QZK6Q2255841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fd7fd3d5665cf592a6abbbb772fcd2364aee3b8f2293b6f508efff033d512b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZTB42298941.
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 0x2bbf792ca5a56926167c99e35e609c343a140cce134df1f05bfb9e18e57dcb70. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTB72238527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f72bcb1ee1593e0706629d3d4ea983024036c3d45d2c9cd4c547b6fae0a38. 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/QZTB72238528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c28cf7f992f350e9aeb9d309aff4a30b0cbb329868593212b5fa38e81e1085e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTB72238529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b343f6731fb10fe41a77c9f77cf5674ba4681f9841839dca66f52d57de444. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZTB72238530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7bfe66ed7c139f00823432c141c232d46b88025b26123d506c168999ca1291. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTB72238534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3544fdddf49af58cf71fbaf97f6c1241eb6f27a4e77f96cae84355efc9d003. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTB72238536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ff10c8574d52ded398ac55824427b420f98a218d2a127661fe034c92f7d613. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZTB72238538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24031ed3eee4585fb3c73237ce02eb4d6f5e9ccaeed82a2c89487001616759e4. 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/QZFYW2173273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d54cb6721c7270c6a39fadd75249e97f26bc4ccccc0eb17ee63be29684d314e. 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/QZFYW2173274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0f5f26606c73a0226a31a99a218e9ae251da6cfbc834020dcf8a4af17c23e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFYW2173267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf5197b21a735d180cac03ee2b6c69da49d82a8d160ac2e2ec906e82f7bdc49. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZFYW2173269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dec39a997e5bfc9afc09a88736750e8ae986e54389f898a3edb8731e4501a65. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFYW2173270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28239f544fff6a3c260df4112e77c2d61b90dd8e9c7cf1e82b0073a01d00c96a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZFYW2173271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c24086aab5f2186e8ec9cf433dffd23475e47df573b1a845d83ed52f8e3ef46. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZFYW2173272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27f289fbf1cc000f5a357a20bf2d463dca87c78d4d8d0bc120170586e23bc30. 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/QZTAS2445626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60699f8d7e1fb52f7bcdde8cdaabf58f641abaeeb058740d4a5e9c590b1b9753. 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/QZHN52228642.