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 0x5f12d3473a97c19ad93a727726ffa40bef83441f6abf8c7fa05f21aa3f0059f7. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d095b380-3207-4a33-ad22-9ecc3ff7fa1c.json and https://artists.proofprofile.net/proofs/artist/d095b380-3207-4a33-ad22-9ecc3ff7fa1c.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 0x812be15a7cca8082f61024534e4298302dcb924af0f831fffd5886778d8da968. 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/QZDA62017132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45fe174bfbf0d10f2481356888377d0e083837f8220ef944e5101b9877dd2c0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA62017133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fef4193f941febe8b269ebfaca5651ef358603bb74988b04ad2c6c0f954bf9. 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/QZDA62017134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5201cae9110b2edafcf1707623fa84de20a116d31f309be27a45b21cb59238. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZDA62017135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8207ccaa4bde4c34d10965f9e4e44262d9e549849a60fb569191dfd514407c58. 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/QZDA62017136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e2cb3fc9974ab953c535d51a868243e22e12d3650d495348057aa20b70c8d3. 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/QZDA62017137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd28e5ce781b1b4096675869d5ee68f3ebfa0d6b8d3fe763babd3484aae778. 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/QZDA62017138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90bdd678fcbef1bed0f7712a3a74999e0d37d44db3cd6c0c2e04d4319df2605. 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/QZDA62017139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f3a4d648a3dacdee0b70536c83dc74a8483fde54a0c51e18ebb97433bbf07f. 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/QZDA62017140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782cc1d26da6d35acb479f17647b86529835397f1ac4b38ab642a6fc2ecee7d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZDA62017141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf5df30ca0345609207d7233c77f0be2a1799d467c46aa2290580cd61693cea. 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/QZDA62017142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a110bb00557499058e5e8ad67fbf3303a22eb110d9999b701a2c4d682323e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZDA62017145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee0d50c4603b90cc0cbd5de8ef48222b791d4f45c03548c0ad930581ad4a64. 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/QZDA62017147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d3c228f606add4fefb7a46148eda71be8859fac0d4a7b376c1d66cb4919d2. 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/QM4TW1916368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4792ab4cf81df9abf1e63d189effd79d9b9bbba16c5b73ce38ae8a91a7634dc. 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/QM4TW1916373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a39f67e6eeeed880e1dd57a018e936d8b0c815d514400deb187eebcb741f83. 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/QM4TW1916374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6879b7c947bd2c1ea290a1a6fbb6007d0cb9ecf488eb29ad512c9626d550b6. 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/QM4TW1916376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab42dcdbbd7c09b037fbcdc457ad99f7c40ffc32a99ee9ea6d0284f1780e0f36. 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/QM4TW1916375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4086993a6e0a047b856861e8e2a369321856f580b91c8414bc431e0ed2d156c5. 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/ARLVW0736810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033375d19601b8dcaebce96143c341385a85f6e441225df7250ce81ae2297d6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ARLVW0741001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c8dd1b6930a01781946ee14e89899d4615747b0023362a7d6c67587260036b. 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/ARLVW0741002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a7a1e1e1677d7a2a84f60402c3786a8e65f010679ac63d6c90a834867b6b9. 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/ARLVW0741003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42602461558e586579e3724247befc0a2508da432852f163abeeba62efa58951. 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/ARLVW0741004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef374cdc79deb5b52761ca33a9a472c503e2c5604f418f27f688dadc5a22052f. 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/ARLVW0741005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc087d5a603c784edb39a25476563f2cac1ad6211e868991b48c5c7a2a04cb3. 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/ARLVW0741006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd724cc221f6aa8221a208805e458df615278cc4a5b75e88d7317194900855ed. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ARLVW0741007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978273b71035e6b7605d948dc059267aa94b95811329eaf2246bd7d52f987087. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ARLVW0741008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee1ee9a795f44c57c3aee93193afef3cae400183a220c14413e69da94ac5c7. 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/ARLVW0741009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88606190bef3527bb7e17c6873c5cc45ec839b0e1adf3ba76e2f18ab2b4313. 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/ARLVW0741010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ec3c5e7f92ecf6ff40a2b58ddda22735c3929e4fc3d1e0619721fb9be50a7. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ARLVW0741011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3205dd2187730bb294782a03cc177c6f96f6586f57cc80f6de1be89a6b337fd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ARLVW0741012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4627649ea661e7ee19a60b4317d5e523930207f60ebde7fb04aae61c4c334989. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARLVW0741013.