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 0xfdfb1dbc45dd137029d702f3ead57384067efb5161cf570b633a57f81f092709. 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/173705d8-de24-4fa4-8ff6-da9abb7c19b6.json and https://artists.proofprofile.net/proofs/artist/173705d8-de24-4fa4-8ff6-da9abb7c19b6.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 0x895a62c0a42a37cd5f773a03e62353d469210744b7ce3d47642214fcdeac31ea. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/MXF152100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc14f802784de3905eec0f02066aa21e7fd8822a84eee971e5d7c3ca976451. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM91933599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e3a572cdbfadb43b565477df98e3b555e9b490593b0ff79f22a48b7c934da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXF152100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4366085b8d95e2c262c4fbcb7fac897ff84761aaef78df792b4b8b9bb4fa9dc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MXF152200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99b739ba4541d41b9d94964d5eda174fcc861380c1eb6a8b7979de6ddff263. 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/MXF152200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66edf52e8a6ceda8f28965dd7c71a4341fac0954eac0f801715aee13bd5b6b. 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/QM4TW2380518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa383ed37586c96aa7d3519f6c1e36f0322a85f82ae805e40c6d35b9d16db2c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TW2378408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66ce733213ef64fb7dba068154f623a0ebca3d4bd3b7db9c692004f62396cbd. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMBZ92332819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fcd868961a80c90abb53c74878949eca7295de66151c1ad25b273f135d91b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TX2419571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b38a23c7b672ec60a0739756dcd220dc5bc4b28a1dae337b333c743af71ca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:16Z), 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/QM4TX2419573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f49763f32d9fb7e671d4c5e4a877a57c44c6da91dab86b741c05c83e0f17edb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QM4TX2419574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d468c045cb3c7ae172e279898f1aa51d97a49d83c1f5622382fb9d778f624c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N22479462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e0ab7acc69ed0279df1185d3e63d5f315d57a58dc84fc252ea8738e3efb55. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:00:10Z), 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/QMBZ92437780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ad06ce6412cadb021ca1cf6604ec5a485de4e22bcb975bd334ac9cc46df213. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:43Z), 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/QMBZ92437781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191fd435762ff6faff61ffa8101926fc72484b4817cf5e5452fa3ec5b5be9487. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMBZ92437783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5757985e3c7710ffe19348929711a81c07e694b669bc9874449ca2b0ee1d22. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:20:30Z), 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/QM4TW2515048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3bcb2911ff18bec5b15abfe289904b8b90a73e1568f69069e473e3d90ec259. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QM4TX2598839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f38da9785cf4578b603ece7f69474eb166c97e0f4af87b74a7a2d866e7b19. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX2598868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dbe16c98803f2862ce8872463f0c5940e0997dbcb1060e630726caead668d5. 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/MXF152000377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2dba1ba9de593ecd9e23d44ac452224ef67677b72620fc5b180fc1c3fb730. 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/MXF152300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2dba1ba9de593ecd9e23d44ac452224ef67677b72620fc5b180fc1c3fb730. 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/MXF152300360.