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 0x4697158e5364dc8711df6275433a31c5e37934e905a5b0ff568849bf6c562081. 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/9ad42a0c-d25d-4e3a-bf4d-725f19433559.json and https://artists.proofprofile.net/proofs/artist/9ad42a0c-d25d-4e3a-bf4d-725f19433559.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 0x93e21c028b6052bc2e423d0ab60e005a75b7dc4e02b214f79ef32be4a57ff574. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLR2031366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f6ac1016d5eee1fb1549d64af19c773dfb394ca86f45391d7baba4e58c11e. 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/QZDA62295075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aebd281c8009b6c0b2f3d2210e1b40b15c48ae8733f8ffa85fe00e66c42381. 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/QZFYZ2297766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9501bfdc2cc515b2fb9f8a2d850842244bfadd82135359f50d42053aef0921. 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/QZHNC2221466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980166140e7c42eafeee2c052a28a8f2053373e76c18de2c4db2a1b3785fbf2. 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/QZMEN2288821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb26a2c252cf18001f0bf0ecb7ddb6f1a7d4104e5b72cb7fcb71590e8263fc89. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTAS2289098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a2fa6b5f039ace68253c55a404b06bc595f04bf100776615a760fbce2135c. 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/QZTAS2289099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2cb15b6a6679a265724f9522a3cdd3559dd9cc17dcfb3b4d9f686d4dd4316. 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/QZK6K2233223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985eb43922fbe38bf72d60904488120c540198345bcbd27af629b84ba972eed7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWR2222486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d3ff73ba39c728109cdd0650fd8bc2daefaaabc36eeed710f38710227472ac. 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/QZRP42233459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1451e39eddf72b22024fe8559185fb1e82505caf56cee73ac2c915289deaa8cc. 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/QZTAS2289100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716a34b6ff1980e9954c772af8fc6a4ed0fbf80e6725e57b9c5decd5ce287b39. 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/QZTAS2289096.
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 0x1573d23f28d8b2a4daacc92ebb9d12b0c2ce1720513b72ba701f71a173bc0d36. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTAS2289097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090fbedf377d62fd4747c69cbc8618735d1606f431cf5411bdc5bf521b90b7e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZES82289459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b5e5a4d3e2487e185730683abffc0c06e4f772dbad148724969a4df2884cda. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:43Z), 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/QZRP52485358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5881ed1fbfca4c471222a0e2ddf774e59c94088f093967e4e122062b422a89. 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/QZWFK2463026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7986d1aa37073621299ba0c10ff22b75eb5783055a607522e9b21db5bf7bb3ac. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFYZ2590860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeacad10464074e4c39f11a195dc18dc519c1cca500b5ce1ee01ffbf0de184e9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:22:07Z), 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/QZWFK2382492.