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 0x8d2f317a452fa0e04d9714c5654ba678e2bfaf132451bfdce6be5a5bf521929d. 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/da8e7b78-ce20-4270-9546-fc1f345f87ff.json and https://artists.proofprofile.net/proofs/artist/da8e7b78-ce20-4270-9546-fc1f345f87ff.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 0x35d56f9f006b679de3967031da7efa2504e65cf709b26a7e1f60ed39b351bb3b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2264106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064b36c82dc49adaa3147f0c5a23cae9aee779968e87fa79c1ec9b7ddbcbebfd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEM2264107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6316660bbe670628ca5cd0b8ca3928ebffe99b0471b6ea0313da1a4c21b8ec96. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB92261539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2410553b51b21a48320faeff316aae3a49c3e4db1b8586b833a626343631ec68. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB92261540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d726d78f8beca1f1c0421b2807321574e7861ae069c32b69f124db09e7fb35c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB92261541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732eded41b3d5c9139fa2dc3a01367687af3f5994791780c3da947f6b87e134d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:33:20Z), 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/QZTB92261542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4198360778550c009a927675efe86655394a2570e5a87805a0f4fe2818265c26. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6Q2338349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cae1de29883ac0409f273bad6e457ab9a91f664e69338c3104b57e2f2b2cbc. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZMER2359714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec20f61cdb92ac1810a8c639338d1e7602e4f7f731d37291361d4f719e70a72. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAS2338123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c7c77e88a3eca2752eed00e20b8dfa7876719aa8a01dffb735cb457a9c63fa. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:04Z), 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/QZTAY2381530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc652bdf965a48f6874f58a8dae16ea3d18d914fed1f3b080a33e64ca73ebc98a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZJ842400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018a33702419a1375d64815c7beb824d808b83859a45b69a63a553d778642336. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZJ842401942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7393f031e31b12c5d7bb35044c88864bd2af9a694ac0781ce01663085020d86. 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/QZJ842401943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cc4c396658839a747fa286fc5508eee5bd751331db53efde7d7c1f4196aa40. 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/QZJ842401944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcddeeab0068f71fea31323e650b7a1618ab70bc74a9e63edece1fdb47852813. 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/QZJ842401946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e16d36bf305b66d47a78cba7c9da68bb44b2a57720818d628846582de09acb. 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/QZJ842401949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb006bbc789f416c35c92695f39acddbe175f09417e840764c1faa19e1884c48d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:14Z), 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/QZJ842401945.
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 0x4fbd5b2a4314e78c162e896d5e6d533ccd4089495d386bdc79ade65d5106bb11. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZJ842401947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8a440538b6cacb003229a6c8e1529d94e2b3dee5990cfa684ee73138e864f1. 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/QZJ842401948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb8c387fc55c90c7ffb4364bcc969ff1fa8c353fcbf455d1271135d87fcf4b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:33Z), 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/QZJ842403675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fb486aae903d6548941ab574be720b3bd865d41aa576b815ff26f2a282291. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZJ842403676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbe4b37a1c4088a2b019acb94a88f10ad41b95703d4958211a4e92b3c6abc9e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:47Z), 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/QZJ842403678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c4203a9da5edfa7b9dd6bcd45b97eff15724271806811fdfcfba18fe67a049. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QT3EZ2413484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd177a783c7ce843322978135ed893bbf697e907ac842897e3451e11312a1e7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES92550332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90fd7882c2a82de4dad8f01838111faa19887ca5b7508e90813ad4b3cc4863b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:35Z), 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/QZK6K2523970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0715c7a483f42c71c8d8f3cd49c482357395fa930c14759b272ac6154f17e6e2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6K2523971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1de84fd12dffb17c05e5ab1206df29beb14d995bdd461c4dea8fd358280f83. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6K2523972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ac33e2d275722cad49b94b58c4feb5cbb9d72e671b34fad8ef72642534dba. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:22Z), 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/QZK6K2523973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a5f01260c19a4a0094186720b42762839024572e07e3a2d791c4436ced48d8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6K2523974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c8f064a9c1d56b7acef87a41bf7cd90bb3c7932e3f04a2d257b852fbd0666. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6K2523975.