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 0xec1e710bbc30734b44542153c6c979509dfe5b11e9ac314919a33c4fe374605c. 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/4f3f2616-86c0-4023-96ec-16e7e47d34bc.json and https://artists.proofprofile.net/proofs/artist/4f3f2616-86c0-4023-96ec-16e7e47d34bc.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 0x3760c32a8b9a91b383c30c938afcb32f16ea2d26e5e55d307c7015f0ef6e912d. 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/GBTMZ2101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83add37f71806bc39461abd3aa23e4d5e9f0566c7f9bd425889b463e9091907c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBTMZ2101059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6251181856e356ad0522a373c8416683b2c070098763edcfb7cfc4b5dc4dc766. 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/GB2LD2110182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f23d139d23b85fa6cf917e8e62754d55764bafb52df1e7f805941e1b77621. 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/CA6D22100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cb7d0a4e65f132a9e229198a42528cc0678ed27e645cd64db2e258b59edbc1. 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/CA6D22200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d793ca7b889e558f11a6e3114e6057e42875306d9f8fae23ef984710101e87. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA6D22300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91599d770336059487e8055cd24cf9da1312483cf7ef13875645e5abca2f437e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBEWA2303824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb809de4c58a4032d5f392c2a1985594ede9a5a870023434d173aaffa91099b7c. 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/NLCK42235982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0700be9cd86d097ec21f42dedcb6b73f90a7b5377b292445a34080adc9ebeb. 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/CA6D22400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f23d139d23b85fa6cf917e8e62754d55764bafb52df1e7f805941e1b77621. 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/CA6D22100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136a4b8c7b901c438266d7ea84920a655bcccb70320ae779b6efead7b408e791. 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/CA6D22200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50098e47d5323ec661c8fa725139451da128430dec25a81b1040b6df03b03af9. 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/CA6D22100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb02783a9f46849c4ad2eb2f7da1aa7d780bdb9e9a246672595f8adb3b2e1d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA6D22300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb809de4c58a4032d5f392c2a1985594ede9a5a870023434d173aaffa91099b7c. 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/NLCK42235982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb02783a9f46849c4ad2eb2f7da1aa7d780bdb9e9a246672595f8adb3b2e1d8. 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/CA6D22300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f23d139d23b85fa6cf917e8e62754d55764bafb52df1e7f805941e1b77621. 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/CA6D22100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c89c121cc0c1d339cd6bd123acbb901b6e37f80ed57b3566c4cf198ad1554e. 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/USDM32357501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136a4b8c7b901c438266d7ea84920a655bcccb70320ae779b6efead7b408e791. 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/CA6D22200535.