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 0xc871e1883e9023896163dbcd2879b7714aee4bb1ca27451d8094ddbf66fa9a66. 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/bbc081ca-790d-4c00-95d6-0c8e7feaf994.json and https://artists.proofprofile.net/proofs/artist/bbc081ca-790d-4c00-95d6-0c8e7feaf994.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 0x36c91a16adae9429424e25894bd6e43dd509d151480aae83d7888bb8023b632f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM24S1804186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbed0226333c36ea2ea89636f37f730c567461c873789d4c47634ba385ea05d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM24S1804187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe48ad4540dada54eadca0a4f9ded74903ed0b06942cdc8f5548ef78378a4f1c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM24S1804189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a456b03adf52b0ee59d398beb7274f2d99178a4b54e2413f506263ac5c14b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM24S2006905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f67645e5f5286fbaa4eff1a07947081d3f4af680bdd0675ae568be1acdab13. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM24S2006906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e3335ad5d90b7e76d1aab450a83b26f31e6893c68e3c49f9bce63a7843aa0b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QM24S2100591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b82d65a42c8b8b0e8031eb62b383e77bfa49f5a881ee8b76dd04ada17e86b70. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM24S2100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9554f496dae8d0699643baba09e49a3e9a2447ea0d4be5f44016250045239e6. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM24S2101337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073a8dd1512af2e3218e9e9641ed1e266184c58f0113bd366bb54553c01f4f06. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM24S2102014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fb86e24a1846ab23a2ec546739aa1174ee4998e5758f60c7887063b9c1dc07. 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/QM24S2102389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2692c280830ae7fd75d1595eebbdb2399f1af42076a7cce96784a5b2e51c0a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM24S2103629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57941dd6d56820dfa1931173b2e5ba2923b0a9352cb57d38438925e47f46f265. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QM24S2105652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479a0ee6e6421863791798827930d1d3392038498cb87a31df394899a17b1ec. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM24S2105651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb36056e960ac4cea5114357a58138f1c89a39c6f4c78cc74ac9c0bb29a7c1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM24S2105649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb37f277f788bc31a028390a3c43340bdc4cc3f2ffbf316ede40b992e347b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKPL2284414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7bd5340527416ad3bb6a91df680e24309a9c2e5461ebc04801a579b92ea39. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKPL2284416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a82bffc0f61b48fdccaa6432ee1ed685a830e563162f3c645f5d18cf2a80c63. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX2425625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abc829f61d5a6a105dbefc40ea4ec1c1988c8346d6c02c511051a5193ce5009. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEVF11900889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a5269519583a294f9539ea5e2ccb849fc0c93acc4182f188ec452611cff54. 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/DEVF11900937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb77389475649043690933323ab60479cd94bd0dc167d956e54b50226a6351. 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/DEVF11900888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343acca2f152df8c02e64240ea6f8c11adbc7bcfc1c3460cfc1be55e3b7bd25e. 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/DEVF11900940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9bba906aaee36a38f1670872c33f8657f18d68dcf52fc6552278a494e2cbc7. 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/QMFME2368322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8a5d52e2cd300720f2dd90d7f8adac29d249d2496b93ef2946e42b06a0492. 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/QMDA72144731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8884477a926e7ebc30c7be85df6bf2a02d06523ba46d8f02c207d0afc7da17. 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/QMDA72144742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b320e07f272979332f553b70b3a288b27c54cc30570e7b3c211e066424f096. 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/QZNWS2435395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e058a0eb2da5d8a7b0eb9d77001578f6d886b6696fe77b522447ccb4f4da224. 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/DEVF11800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85ea3df2686be39ee80844ed167f97156c95f4e135095a0fb3799c3c05ef1e2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM24S1801127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea496d1476bb2c30c5247af835bd15ed31a257d92772369b99fc0f2908bf106. 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/GBKPL1961251.