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 0xc9ed7c923da4f5d680dc31fbfa05c0ff7381cd1e3bd6ce66f7a2f7b7ba837e8b. 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/11ba4367-27ee-40f1-a7ca-ef9a42f5f856.json and https://artists.proofprofile.net/proofs/artist/11ba4367-27ee-40f1-a7ca-ef9a42f5f856.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 0x9e143341c04a87243b555b0d1634e0b0551f824a202650f0987a576c6514e3d9. 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/ITS782000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b9c16b0029b84f05452353d85b4a8631d46a19050a2b049ad85e5d81919f7f. 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/ITS782000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32c5d4c5c49dc6de6401600723e6a94ec975a011b0201c0aa9844a12a86f906. 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/ITS782000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929bdda43d838745ddd53f47f86e47325fbe9947f1332636c8db9b41e6946aea. 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/ITS782000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9ce62ead91010bafcfa65fee1898081064bb263688c1c0bf7cfbf51781ebf6. 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/ITS782300795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ea7d6aab5aa46365d7ace87df926b96ab45457020b461d2ef9a20bb86f0625. 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/ITS781702148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03264dac9090bd22ae3f3627ebd64abe912695a23dc09a82e0a882b106198b85. 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/ITS781702152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf845e36c72c3285766a8ab56c48606b5d37eba20efe0c10c9c31b08bb2f5b9d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITS781702153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70922f38c025c96d4d1104f8a22a1f8c8bb4025014d2fa0d26380e3410868af1. 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/ITS781702154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a18b9745ef5bc56bf09813f65001b3f5b8e897936c97e236da41ff4dedb16ca. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:57:21Z), 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/ITS781702155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08f02dfb719ac210da3c152eb6447568b7d01862f13ed2b31688318d59793f. 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/ITS781702156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0f5fef12d9a78a39d283f180666b5024706e7b825fb94bf531d13ce21b6ca7. 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/ITS781702157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f74c29d2a2ffc534222769ac540afd4d9d71b36f0bed8bf229aa35f18c7f8a4. 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/ITS781702158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b42fc80c978193d39f736689c82b5acd1ba20ff87a6d551ddd4e312649e583. 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/ITS782500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba2adf2e9aa95c137a5ddc28bf29e7282e2595cc4869db083ce69a772f137c5. 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/ITS782500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b56ad78282781d12598f559ce34541cf64fff83907d31a179f6e1924578e6. 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/ITS782500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62585452f1a09cc3da17f176b75710f60b6e4cf2f49b267df28115008ec3d969. 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/ITS782402172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd3a54e129284b829a63e13fc932e1e64ba14b9acaa378e3592e88891a9c2dd. 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/ITS782401952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b8cbcfe4935b9e58e4721e9faa90c70c3e322bb2a13df1ee3448075c9f1a06. 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/ITS782401884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325dbb226c2d5f907575a92f666723d039c5a9c64f493ea0ca6e08b3a4f78205. 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/ITS782401854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dced75200ed66b8b8d4ea6ae5ad7ee642e2fb28fe0653f1dbf719cdcc62393. 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/ITS782401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c12190ef43e318171bff908c5a1d2cbe85036ffba05d8553f7da6c6b81a6ac. 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/ITS782401376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b64f1a664a6e99801617102f164037ce39ebb65d3a85fed61e9a99c80e672. 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/ITS782401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5bc0ff6dae978eab2cd4b7c2f9c2304210b41748f289a8c039039be35f0f1f. 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/ITS782401018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a19558eb77f530c82650e8dd99fec459cb4c7c25a3a00ecf2acf12d839b13f1. 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/ITS782400934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14141691f2ca8007af894fb224e06f85bd71c1114a25bfe517fffacd6d1f7ff5. 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/ITS782300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe58628366be4f5826d9f3711962fa566710d5e561651bd0315423112d4f9061. 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/ITS782300848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4624a47048d53ad44a0eeff5af370aefd369f1687089e03c673499dc224dea7. 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/ITS782400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ebed62a2910c40cd326fd495309969d8642ae6638a7fd43ba4cb8f6f0baee7. 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/ITS782400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d62de62a0e4fcb93fb95df6b484278763edf0b8ac0ce7224a486e49516ec3. 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/ITS782300768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167576fc1c63cb4ec03a96ca274743842113866c7e08a9fd1a8910115219fcdb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITS782300765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9e5cbe4255089f213b05f1de5535fafe4fa0c0d2c740e70892689ce0cfa11. 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/ITS782300821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061216150433016c603d7628a46138a009ca2492287839e13cf26ec3a2406ea9. 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/ITS782300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f373185d151c2a56f8505d3f5a4881464757c5bc75c89419026a93bdc9437e. 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/ITS782400020.