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 0x7b4b082ee7ee7eaead92f2bbdef515370fa79b57a7cfc85e216501c3b54bd6e4. 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/48dd62dc-af0c-465f-a3f3-8ad8cd906e7b.json and https://artists.proofprofile.net/proofs/artist/48dd62dc-af0c-465f-a3f3-8ad8cd906e7b.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 0x247a130ebbeb73a7834827fa76b13a863686e682a80c3f0bc1f44d02deedde6a. 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/AUMEV2405685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a51b18b71b823146eb3bbba8de48d41931dd0dab7e8dcb4513d078f7b41e5a. 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/QMFME2365869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2fffe0c433f75d2cf5933270b4b1f95dbbdd9db5b8fe1d55244b5ed1fb806d. 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/QMFME2365785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cf2ab7b4bfb2011062f5af94e0b72ff114211f94515e68125b0d9242fa329. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME2365864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9813119b2588ea8b1fed482554624e18ce49da931a06873c129bc190be20c796. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMFME2365744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91609c3b03166f80e1871342fe2f247ac086bd285fbacb940f7fb3c5c5e12a5b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMFME2365745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54abe2c106f4d184df9f3cd78bcc8c0a26d22ccf327e22424c90a381aef7c5a0. 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/QMFME2365818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b73216ba385367c569fb5e62c6535c647e2730b5b6ec69deb11b71f47af3b6. 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/QMFME2365777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07be345a06560b95486fb5332ee6624387adc36b9d89f4698c8f55707efdb21. 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/QMFME2365767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91684eadbf43f03b5d88dbfc8704d1f8b933899473b0b723b0502d8793a95e. 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/QMFME2365849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe391933f11ed285455724ddda3259252c2464af7fee0ae96dd77707e08ddf1e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMFME2365848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2f6d99cf302803a2d929bb4524ce66522415b38f0339c9427ca837b469c91a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME2365860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d80ebc90b3f63abb5f37905940c71864525ae981633eb2e661485ae403f750f. 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/QMFME2365776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bbdc2969c604e7708f334628a5fcf9a4409133edaa50c347daac2923a95e9b. 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/QMFME2365825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81b09f91f0915ffcc7b5cfd4470b8725131481efb5bd42fb82b4b0b3b8182c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFME2365822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344b8166b23833f4bc3ceac2243fdfa65b32c2490934fd8d80b315021cbbd217. 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/QMFME2365819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc0671290b4ec3ecf0d5e28dbea2d7f83e3ed5c0e7241a3c88f4844dcdb4f0. 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/QMFME2365867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4fbb46382dd8ec0eebba4ffff308127426a198878a5a8c61b29205dbdaa58b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMFME2365862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7175be3808331af35e5d90572a733bcefee43d0a7dcd95f707082cbb6e22c7. 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/QMFME2365863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5781d1f24c0bd7af00cee8054b5c8a7a3fdf74f782acb549c852a9da1b97da41. 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/QZNWR2002082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1f77860bbb56bb982231a4ef2f796ec84a29b317a931939a41f19f40c8827e. 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/QZNWR2002083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fab11725656736968f98522fda00249bf8138a295d948559851636bae202af. 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/QZNWR2002087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd358e0f0240ba2a178557f51104e21fd99241be114ae73b7c26bd85cfc1cc156. 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/QM6P42485317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d82f3c7419d371b89379cab4c4a25941b81935193a9813c89d289163cd1d0ee. 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/QM6P42485238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a9f87254165565d00eeb87bcbc9c798d51bbff5091e5abb04f8674b6cf531. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QMFME2365690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269e36539828cf7a6cb23d3b68b4ed7f2a50646c12b6a79e6bfd93943694391f. 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/QM7282335186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b230a0663b7ae97ba4f3a7d0e36f05d945b29efe8ee98efddbe69e5d62067. 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/QM6P42399918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c1daa2c2de8fb3779af133d7fd15b76e67d65ddad2a197f2ea492f4bcf0f2f. 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/QM6P42396848.
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 0x0099b499eedf2f98f699826de678faf9a5a7867a1e56dcf45011a37e32ee1ea5. 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/QM6N22392060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7f3869460de7ba165abd8b8281ea70da29004bbede07686f1dd8fcf977e4d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6N22392020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb94b890615776d3c7d5d44f7e7d1a4a124e820f0c7fc52631d6e955b27d9f. 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/QM6MZ2393077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaae7322687fd67e6dc442816d534f2dc1e3231dee188641e8485a98476efc36. 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/QM4TX2374722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f8394d5119dc7f31574087e7bfbc63fc03812fa388aada77b115cd9e542000. 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/QMDA72225897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8250356c79e8459e52160e555681f1df6ab427b1329e2cf605abc1b3fedda28d. 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/QMDA72222203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d897366a06a42917b813d0bce1506fd61152bd0aa4677de76fa3938a4818e36. 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/QMDA62208980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7973ffc0a3b4b449090aec31b695d891b4334279d5e0156d386c787e0735a1c8. 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/QMDA62208973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0af77f1511e06ca495a6eee3eb14bcc9d626500b73804f28b946b8d8cf1010. 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/QMDA62202916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda36ddf7cfa887d67c45d1276d4b67d8058546d63773983e248c7fc189b4c3c5. 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/QZHN42274081.