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 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 0x4e9754d3de02f7fdf882df4620e016fdb2f03ccde147a4f8acdd3e93dd5ee324. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3fed55-60c6-41b0-9f17-cc44baaad130.json and https://artists.proofprofile.net/proofs/artist/db3fed55-60c6-41b0-9f17-cc44baaad130.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 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 0x6fd268de62e7a0ac27ff78f22f2ddbace1379c68d38421822423278cbeab6dbb. 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/SEXGF1713709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64344c1d3b21d176f49b8ce45f6241b325df21ce8cd0c39537aeadc87a03cd1a. 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/SEXGF1714102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0c6620545a2edb2f5813ae93f33a5a65c7eef996cf07d827032bf2026b950. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEXGF1713705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ecdd82d8bbfcdd8e23b9dcd04b78d75993b1d4d89cbe685171e36d4015ca2. 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/SEXGF1713706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336ba8ae00f47ea95d9483ed54a50d0f07e0ac28825f043d179deac5229fcbf7. 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/SEXGF1714402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d816422a78bc806ff34052a3e79378d0739a943a6c9dd71bfe5a3c3ad1936bf. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEXGF1713701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cccacb97272ec3f0f760a3dd4c617fe37b02dd3bbddb898813a6149e178651. 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/SEXGF1713708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feae33a9d86e9929ed9c34a8bc676e500d3963e43674bfdaac1221f439a3bac. 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/SEXGF1714101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72298e802252b3d328e27839078c0e28841fe14af5251eb76da54eeddb23e4d. 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/SEXGF1713702.
It's Beginning To Look a Lot Like Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04633c3f6bab3f63f3632e60a85a59299d1947549a3c6d9ee327231eb5e9e95f. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/SEXGF1714103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2994c882b0a459d75a28d07165b17ca625511a1d51b3be5391025eaf8d3db3bc. 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/SEXGF1713707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca3c193b2e0dd57b2b759734e53a60d7186cff29313063a87ad3bda04db12d3. 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/SEXGF1714401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881ccd8fd1b8f9b4c68c4c49bd2b18d9d80ad4810b2b24eb29811adf45e1a9e. 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/SEXGF1713713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e5c58c151485db14f93d8326e4ec5d52cebf7ccddf4a1bd17c83d0314cdd1. 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/SEXGF1712305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a47006bb37788c30a04dff2ad03f19b7131af2cc83caf2966927fc5f51c96df. 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/SEXGF1714501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8303578203bd1316d8b3ef74c12a5e82c41ff1ec92f3b6e5aa6e56123c0f4777. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/SEXGF1714502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a52cadb379341e3a4efe08984713716adc98e373aa632c8a7067167d60f3564. 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/SEXGF1712304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a7230c03083edcb7b16a6cdd5c0ae0b3489217476aa270b531327a538ea717. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEXGF1713711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf386772e614d081242a972950ee485692e1aedf89152133112f94bc7ff9d0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/SEXGF1713710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac51c6b9ac24a5df481b0ad9c760bb718e6c7dcbdfc4213d446c8167bcfc3bc. 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/SEXGF1714601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c97c3e1d017580c497508569a666e63d1770f1657eada2a13b005b8039a0e. 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/SEXGF1713603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30a3321df2c1cdd4c829c07e39c49a89c8dd5752f0acba094eb5e74b9ee3d2a. 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/SEXGF1712302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31110a3e3e30c51e32da27eefe57718c0241f44c3e40f42ec29f307226682d6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEXGF1713901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae250bdf6fa3de9d91a7dfed708963ba17ca22fef1a89371d6ce54bb5af2cd4b. 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/SEXGF1712202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f984eda5b1a6504ec898db9650f84da12aa5b4d1fd5d8ae06dffdf636fe3fca. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE5ZO1903801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bd979e7cf2f354977085411c5fc6363f00d5eaa988e01343b18afc59fe780d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SE5ZO1904001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e85b382f2c8175a36543fbe1d1aa41108948bbc2cee3b5565353424c9333c14. 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/SEXGF1714001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a054ab7d04fcce40e78840d90900c7d62fff3233b6592ccb36396ac09a2e8aa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SEXGF1713902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dacea1680c10c63a37fc041abcd9b3131ca9af56453559f65717a88aba05f9. 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/SEXGF1712701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881ccd8fd1b8f9b4c68c4c49bd2b18d9d80ad4810b2b24eb29811adf45e1a9e. 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/SEXGF1713713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d3007fe469e02b410bff1bf7a52125502e3ce1721b1dc9c97557ba7040c1b. 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/SE5ZO2003401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801fdbd474deb89eca040074a6bfe8d69b61a108a7250b50aa313531b10e56b7. 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/SE5ZO2200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c97c3e1d017580c497508569a666e63d1770f1657eada2a13b005b8039a0e. 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/SEXGF1713603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d067cb36ce71430f93e1b1f61f23eb824eb13cda2fc680e0348de45f19fd8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEXGF1713602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0873d3bc9513e0c5ba46e29e6c5196c71764fceb963ebeacf248fbe3c436ef7. 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/SEXGF1713601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8263c1ebb876b6edbc15f218ef1418ea0d44b367166218fcc08e5ae7f2d944d5. 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/SEXGF2202805.