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 0x5c31053a0436fa5c7ab7ce63712713ce0d68b0029762267389493f7b3ec1adc1. 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/dee70016-1e4d-43f1-a086-5fa9d623afdc.json and https://artists.proofprofile.net/proofs/artist/dee70016-1e4d-43f1-a086-5fa9d623afdc.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 0xacae0add597700a8238eb1f16623290a1da251b20ff2fd886d1b8b7bfd5a0cca. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ES6720500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365c74ca5f49aa4badabc27ba9702d14ec7076e7a71a7be4e800d99cd0fc34f. 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/ES6720500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1792896053bfcfb039cef593ab07e4e11d27e2632efc61e2d853a9ed674f4ee4. 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/ES6720500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3e5c86f1fb637643b6b0598307b58dad70c6a132b371d1ab49ff23681b35c. 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/ES6720500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa4ba973a40527198138773c2fa218733b9afb7db603b9a4bfccbdd0fb874da. 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/ES6720500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6437cfe77da463b150299672bb484f3e98378e246f9e41b805e40f79efef1ba. 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/ES6720500595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a14138fce66eb76a8d22134169ee7befc045405248b70dfa6c4956583c357a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:47:47Z), 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/ES6720500596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f80e5da6d82797db765ad59cc37446c023ac05a20db05fd02c22182783838c. 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/ES6720300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62002264966f0322adefc8d5f4ca6152ff290af3406677e778c53a844ce4a6d5. 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/ES6720300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d85d8efd2f3582a44b46014f2bf48cb10ce2bdd598af48b999fec86e2eab4fd. 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/ES6720300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcf39f3f304834d940353b922d1385817f2d9d4d5f9ee5c1921e4abfdb9a83e. 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/ES6720300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ca36a8a326b90a8c216993efdcdff79eea980c113defdf65e1648576389b33. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES6720300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6d2bb757cdccaac761d7958d2c8f6b5a222a23238edd2ea1c63fa9b39105c. 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/ES6720300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc50d9889a4cf31942030eec722dc11bc2c3ace60a96ae8b80bb2d24137c22e3. 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/ES6720300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90dc8f2cfcf6ed789e252a0491ed0611dcb1889b7a4ef0bdb02267bbd8c6aa9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES6720300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0699e0d8c3434de2c661c39d893c3a79c35ee283f274656405d8cceded714d69. 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/ES6720100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09dcb3c7de2a9432620a8eedd04cd8a582234a91aed7818b8f34f0b269b8b86. 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/ES6720100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0897dd2d3e256949f2fb036c39182c976943773dc8e4390b921e2e968ae9bd. 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/ES6720100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeff57338c8d7e4d58657f95beb60051cf9c3265a630cac1b23c0ec97b7a117. 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/ES6720100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fe83b02ba78d99d78640c47ab7ead7ff5df41b076b3ea5d05714331b609e14. 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/ES6720100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d189eebdf565b4fd295f31c7546693458fc681d6716621b8c8ed7d179259e3. 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/ES6720100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67d46fb622cfc807bc51e4b74856331ca4a319cd23c569a47d236784e855ec1. 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/ES6720100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4d043d0aa723e8df6b66317c427f7d22a9727638bcdd6d3090b05da0e32b66. 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/ES6720100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f29c358026dd98c20f85ff6ca6bd6d5b650a8e157ac38b1841faf480fdd1367. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES6720100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f7ef56268d55b576815fcfa3945bca9f710714e005d9dbb570dfb32edf2ed8. 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/ES6720100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c657ee50a8d10ef9c1d796c5f399818b2e48da07b3bc720c4039402528ef86e. 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/ES6720100069.