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 0xe2ca9d09dd6e175d05da74e67d06b441e3a3c98e6f28eadf9553ada117c7939c. 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/44f05955-bbb2-46f0-b540-347669d633bc.json and https://artists.proofprofile.net/proofs/artist/44f05955-bbb2-46f0-b540-347669d633bc.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 0x7db24e5db061177e5c76f6ca80f7963b56900c942a27b6c37cddb2a32c80f2c4. 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/QZDA72405673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0ec786519dbe5b22e121c0c74e56fc554ee8460b3bfd40542a825853947d7e. 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/GBLFP2413732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00089f8e073e0943a1f6460bfc0499050212fb56c1578946a65e3d8d03c6426. 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/UKXN22393705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6a2eb6abbfcf60b7709f6de6179871442894d8dd1cae02e15528dd6c78db14. 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/QZRP52298615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8decbae39a585dd60209ba26249a4b2477c4a81c7cba9a532ce8499e79abfa. 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/FRX452246770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48c0ab27557d9af830096b7d9f777fffdeb5480aa04030fd9654e8b2267f8f5. 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/FRX452246771.
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 0xa968e535aa8823997799901204b22aa16dc2da9a522e8fb7729c1767e76d3c09. 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/FRX452246772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c04ee28e830219d1d3a25a599f1e948bd4fbe7b1669f52a162dee496f7d0e. 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/FRX202258817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881e23c4fd05622acabbecc1d69edd463d9795784b69913fdc87e8b70b4a1182. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/FRX202258818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18cd90c471132b7b0a62e35e0bbbc9e70193c4aac0ca52a96e61b0ebb26edb0. 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/QZES92282367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4188542a2588c59176a24e9d8b0bcecf104ffd943754b35358c10aaa8f59ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2202296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb944de46eedd24543890024f525610aabd2713fd29e3af6f92ba56d71aaba. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/FRS182123259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa79ba5b5ac3b2306c818db0d2ae32b4835dae085761515785cc442181a8388. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRS182123257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0467179002923f2f189685ec3b07e41a45706f9b1ea443e188ce8fe797c1c7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FRS182123258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e901f09933591d1c4653d3f782ceb8b29583a07fe191fe7ef60286f5af59ec7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRS182123260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e0376119adbf591857a7b266eb050f7ee3f980c4f6f280e0c396531d1afcb6. 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/GB8KE2162059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6f7fe99681a7c1dc0d84720340271627c4440fd7f5e089e5d555b0c965af6a. 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/QZNWR2193878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bbfec10a82b98b4cd0d3d0236fd66efa2da9f83059cedc8d80a49ead3d1206. 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/GB8KE2155505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5ccb2e2ed825b132a1606d82323989842d2fd8c213ece9ffa9aa6b666874d. 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/FRX202161948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafefc429b11902d1b965ea4c7d069808b7edc23a675e9708d7d03d5b62331ef0. 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/FRX202161949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc1cf9584780558526162cd3828f4da625fbba483973bc7d60ca78efe4700a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2159239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8c48f47d6f184a47a28789ea43d5eee9aceebfa9e3e75820c06092c3f811f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA072113799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce61dc96c34b9de3f8e274cec39b7309e1e3edadd04a06ee630aa52b3ed57bf. 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/GBM6E2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad75bfb43e68fcf10a54dc92f83e344e0caedc969eecea74a2d161cb2147f3e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBM6E2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd816b2c8a1a829256084dfcd16d7ef2e30b332accec2b3a2fb90d8abe1f092f2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBM6E2000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e05e8098f5c3e6aed710952e36db94dc0580d268abf8fabcad0af64b64981. 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/QZMHM2086025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341d026db42eb793f4d4c07b6333805a820222b0216519c332cec8eac731727a. 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/FRX872015782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61208d8de16373d3d7cb279ac02110135c0ec8d1c6c34a18e2af63ff32b76142. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX282010189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f3436a13b93c94bd91c36fd56b0c3ae9bcff6c4caf4f23ff4f7de741dd8714. 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/FRX282010190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92a6156b5c92c4b845311f75bee1cf7311a105bd6955f8506ba15d6632b7f0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRX282010191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e0d73f4a11b7f9907f9fe8d7ac41fc984fdddc94865d789716b3510ba7fc9d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX282010192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ab8ae123b95f454fdef8b5a76bde9547c0716f377ee0c6820efb7a781d6ab0. 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/QZKDK2063052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482a226f559a7b2cd79a4913f1b5d6b783a0896400b36e03d52f09ceaf871a07. 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/QM42K1961676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fcb537d483c70f107e7467a20a33c41661860dd2a18b3f6ae686601d4c3bf9. 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/QM42K2051303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa8726c3ee969151fda3101de043b9fbd58ab6c3439e5276b4b05bd19438e3. 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/HUMAG1600507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99866e5c22d354719de32588cb6b3179c2a175660374a1e5f124452f229931f. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/HUMAG1600506.