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 0x8d57af7b54fea0002c2908335ac084150e115f7517bcd1b2559f624befabf833. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cacbddf-d9fb-4306-9e0f-7ef756c6e0cb.json and https://artists.proofprofile.net/proofs/artist/4cacbddf-d9fb-4306-9e0f-7ef756c6e0cb.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 0x0399b1a3729ca0f455a659178532527cc61cab2e1895a31e3c65c5126e0aacc4. 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/DGA0L2303678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e7a35c4caab483c7391a597b2ff59cbabd80e00494c27b4e5516ec75b24e1d. 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/DGA0L2303684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fb5bc840f6e0de3e01af5b1a1f136df4a417ad97a7e1fcdc63b31cc5001b8. 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/DGA0L2303686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d9397af91d3b502adf10defe7464e3e22f897f874fa8305a9110a9546c7267. 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/DGA0L2303690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dd084af83181026346114741927552ed1c41da557608120b3bb44118558abe. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DGA0L2303688.
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 0xd451491e02c95a30eb7049f165f48ed66be267daf39e3b2516466bdcc1d1d106. 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/DGA0L2303691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c77e97d7a59cd9e4d9599e7208663d07b1f706e58804f5b7c906d408edfc2c. 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/DGA052307815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9868e64649201f3808474dd996ba016d469fe1040c8cd78c209a5660e79cbe7. 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/DGA052307821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08da02b2b7b48d20df7629e0e89a576eebaefc048a5db848bcb5d54ff183378d. 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/DGA052307823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d9831dc54af65812d838d805fe18c76355a3b296d9bb59c368d30b24605146. 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/DGA052307825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fffe1f5d0cef1f18239f6d9e9f1f2631fb8e1f2d80fd2b379322f0a5584e3f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA052307814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fca35f65a79a19b3d23919c8bd9cf4d65a8afa31193ba1ca71c32074c3b1f9f. 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/DGA052307816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5757304827334172a045fbfc5ae90b600efb86f966e76da193f5a6822d100754. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA052307817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0946a42612897bdbe734facc8518cb2546697e2e276d244057c7b996bb3fb42d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DGA052307818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4fa51005ee1a7e2ba2adeb78b98e0b6a9405f936e2203392853de111126a61. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DGA052307819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c738bf05b230427065712bc580c4c7b6174b69a67ca4078b1f8bd30057e28c. 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/DGA052307820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc552cb0132f0e54d8fcb38e984f189d2703204a315d520872cfca2e753ce722. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA052307822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430ed725650853cff4bf2f52c2d7e26f6c4237cece5167f87f10c49c1d6943dd. 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/FRX762150430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a5b6696aa8bc625cc25501bbd5a65fbcd47fd7531413a8761a42aedbc36fb1. 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/FRX762150436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc76c77289359233648252112e0dcd2e025222c55077547ceb540b36f9bc5085. 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/FRX452032495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1604d87ee47ea8701a84560529b61479c8e94a5fe49bea2d6ed99238134ce901. 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/FRX452032497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6359fedb40730b337e5abdc5b7cb2dcb070e8d34e393d7f9ea45115b571eb1d1. 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/FRX452032498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2b443b862e13a5aa2270b840fe0c793dc03d14a38b17a8cf2e77fb324401f2. 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/FRX452032500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd843f05073750341bdd9b191f77e91a3292cc90c3292ae86055e38c015b8d41c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX452032496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff465638238ef7e4c511544f18a3fab81fe4ffacd62fbbbf4185c48b925c691. 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/FR10S1921040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea51936d668e887fda86e381b67f64180754db1c1b1a0292b7b4f814323dfb2d. 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/FR10S1921041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4075c5a2c56d996edbc863eaaa4ccb16edfbc23658be2a6d2354f5dfd9c69749. 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/FR10S1921042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814512212eb0050bc6cee6577b59f8a0165b18c57fbac2d70f0da1e63f550e64. 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/FR10S1921043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb124d9165a112f4c498b4c7f33ecfb305938a38d07aaa1708ee9072483666c00. 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/FR10S1921045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a924ad2f212857762d5519e55787bb7c864c24d2aea09711201f55271a35e. 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/FR10S1921047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac9f16c6501d57b4177ae9897162d6b54b0514e7f2f69d60c047b6459e6e9a1. 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/FR10S1921051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38544f8e37e07f38829152d5e212c73d5aef5bac70a7d06eeb89805fac4d86e6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR10S1921044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b19b66e0311b6ae4d2ae5dd9d4f7d6ccda8ba0fe90124a6dca58d18aacd877. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR10S1921046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f1d802c1b5d22c880ed52a399a56d4af7451b689bce77ebd19c890395d3ff4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR10S1921048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285c224bd1809d8648f141a6a62d2361ea217da01c510d9827662f53e33f2afa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR10S1921049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd82e3c792f32c1670d92f0a87ff3903021159758183a42eb02361e6c1968e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR10S1921050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ec083af666fb1ae2eab6f12e973d8e04dbbe6dee94508c00c4195414a314b. 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/MX2832307351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e8993013837b5ebc6ee5019268c44c1880a732fb983ac2dadee2320257a6d. 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/MX2832307360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaefc612e8d2c24c95a14954840dde4c8cb626194cecfc60d11c4365a2a74580. 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/MX2832307382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a99348a7ddb43153382d2c303ec23f8f500de1036ae39c887cbb89cd8a102. 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/MX2832307385.