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 0x3d8f49b51beea864f2a2cc5267c89d5c70a1d27d62276db2c717f96faa8d2c3a. 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/583b68da-7a69-4279-bc69-3d4cc5827c9f.json and https://artists.proofprofile.net/proofs/artist/583b68da-7a69-4279-bc69-3d4cc5827c9f.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 0x12e07b9f8b719c9b80194476e37732b151469206f096da5d285dc2933128c8c0. 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/QZTB82291482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afb745addaa22387d8688e3bcaf5dca1acc238a21546f28d54c3aa44b53017e. 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/QZMER2453068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6e4b8286d1a8774a25a5770a72ca022db0592872799034196365c8c8ab09ba. 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/QZHN42428100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e07b9f8b719c9b80194476e37732b151469206f096da5d285dc2933128c8c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82291482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247541bfe23fb02930afcaa4401d06e7ec65523ea84e5992e35adab5776dfbab. 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/QZNWY2327806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef04c4b27ff2369186327d1b7456f97654bd364d0268e1dae62581bc827df527. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ72387399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcede6be9a8760291b68faec666181249cc435294cab6d9f6160c0eec8e1823. 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/QZK6L2391739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c32465c4eaddc408a2df454bfba8fbed44b5bbbdafc75992c2e5b7edcfe32a. 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/QZNWX2269905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20adcf65ee50b342cf68d658ce1a500ac1bf9df9c32a2606aaa2b97672cf8bee. 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/QZPLS2260171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ac1f02bb1a1470246e44c7e6e3b1ffafb374a836a6633dfe7d89424e9c50a0. 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/QZDA62266813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5b5820251b163055c4b3c8258d1ef73894bd7ff748d87496fef2ac3860ca7. 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/QZDA62266814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec257c18becab2b7e4104b3944204b2413772dfc5272ba5ca1d9f3a2ca17ac. 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/QZNWS2176055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb800ed06bbc1fbcab93bf191b9b047c805792e2e56c350a31cd375d6d7e54daa. 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/QZTAT2198901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6eb3d2d3e64e24111eafcf869621731346bfae4c4d5b6fe24fd355a4453268. 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/QZDA62266818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292ab9515546bf20ba1e8bc8645ad86aef9ea1e4c3ed7aa16fa9531071494a9. 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/QZNWQ2507548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5495a9d3cc55e5ea252fb2ccc698b8d170383fc0a40f13665538416d2c875eaf. 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/QZMEN2538437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942e0bdc934765c760c74e207d57f4f0b2ccef9564f0fad717589237a445878. 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/QZK6G2504682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acfd03a02c11076ffc4e63ebf3c80bf52c032541c0cd349c7c07c403faaf382. 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/QZK6K2585955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75b8d56e29f0c6a00fcb1d46197e6090957364f98ec1dbd6918b382609e26a. 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/QZK6P2536719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1bcd34912ab1f15875c2a97550e329208486c3ea39dc4442fdab61f06f6e5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNB2551979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d30b6b99028facbc62a1e7e713aec140a2ed6fad93c0a5a5915fd4e26a00cc. 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/QZHN82503040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aabe855bd0dec568fe74580aa388543e747980eaf8ce265f7b0b4fa844dacc. 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/QZHN52503052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9729639a67ee945d6796523bcfda88d7c2beeca1f57d4682bcc26038d3f9d4c. 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/QZDA82556947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5260f3fdf846bb0c540db31629fafdd004c9c5946ff25ebdbd3f0d17aecd7783. 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/QZFZ72503950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc0f46170f7c4e168ce325e381c91511190d26d2d152d4dc66affc5f97fe66a. 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/QZFZ22517197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1448f0a42887c34d8174d66239a3177ff38e1905f28aea910b13dbe4601808e3. 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/QT3EZ2415545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49941fe89e01d87f36a02fcab3ff672d10ebb7dc9c03294bc52b4580406e93ec. 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/USLD91769117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef7c95e19a198650cb6a663aef99dff46dee837aed77eac1c819079bc58195c. 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/QZAKB2444128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987059c17e79b964204d74a378a9d84072f6a52e0ca9363f4c2b7b9d63eab474. 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/QZZ7V2438152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc3f2ad7796b0c76913b9ee26a84e9a17bb95d7fae17ab7f61e5f4c793497e. 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/QZZ7N2484468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9c218d80ec20577a91b6e84eaf63387380a0ea9de66adfdf66c5dc8aaa8d49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ7L2414968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b7751e35fa361ce588f27a5db13fbd3b013978c0aa7c76c54d530db56ef2ec. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTBB2427393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e7efd7789ac30b2ca786bd01af9e52e807da6da2ea63a4844857584c3a2445. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZES62455735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e58b779c6876d426ab01f6e4921fd58a88ff1bc5c907cc3a50449f6b5feff. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6Q2252907.