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 0x99d6ce2cdda9bdba954fd487c2aede5de22adb170b684503fc1cf93ecdff7449. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f115728-709a-42d6-8c1c-f4077a39845d.json and https://artists.proofprofile.net/proofs/artist/2f115728-709a-42d6-8c1c-f4077a39845d.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 0xd82ed1dd5d5aa638a54ee41d69cb3b14fa343573a98e19340cc213fedcec72e3. 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/AUGBT2351906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782860e3ac73273dca3fba51dcfbf65ad75c49a7d622b63700b2b80d9a2ba4b4. 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/AUGBT2408293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec188b96f98b24180285486757aedb54d5ab6d205c39577afbc615cbdb05d57. 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/AUGBT2321393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00631c6e52b4071560843824e2a889ad8ec86c7493621a6884260e3de1e4f3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUGBT2321366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636dd4e3084591796710e146466ab005f22e347c03ae706ea4d437897703e1fe. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUGBT2321355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b928770b99accee662ab24ef63d5705280f61ed905c6c40413f683784771ae. 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/AUGBT2321349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b300627e443a9f95611febb1aaf8e5d8a4c0a514fe52262b8f30906d4e64183. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUMEV2407572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a345aaabf7380647abbc5459f14204a612349e48bf7f5acb55ba397bb186a9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUGBT2351893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfd7274638aa2b5a970dfa1775119c4b4edac0930171c9d50482b227a77863f. 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/AUMEV2385353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d188e0184c721e43767a3584aa2ae7581f643867710382b6a1c10d3d9a9a2f. 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/AUMEV2370552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0820a83f1ca86b4b4ada1642a0688267f35348bb34fdced0a975cbf5263d49. 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/AUMEV2341676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf190cb3a54fd6ce39a6c8626e4be2b5b03ffd9c1ba60358696a66840634c471a. 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/AUMEV2341673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311102f387e22e8f84b43746a32e394f60e77a43776a1c2d239705d333ab718c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/AUMEV2341671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658918218557f78c448e90133305b2b27e3ec04b3545222e97848d4a23e25afc. 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/AUMEV2341108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76063aa9ae62089a7bebd676b55e98e7b62dcb2576429821ca184aa3a2816c2f. 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/AUMEV2324294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0f010a64df09a4f74a61c5fae0afd0575b41d69ce3778896bb8e963daa233b. 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/AUMEV2324295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb353f461331ce531964356f842ef8a8c31ef0346847040d98ba56e3a5e1955fa. 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/AUMEV2271448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa5dfcf2121c859058181d9de002bcec57f8c69e55569916b6ff4750b735646. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUMEV2301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2922eb2452189fc326427846441cf34148ca652621bb3e32a9585b433bdf3b8. 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/AUMEV2271447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fbe23ab6ca9b8ae7c1ca451164ebcc5c4f45770a628212ef88f17c18b3957a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/AUMEV2262290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb56a35dc2b5e32aafd17afcd0d1f77ad10072842b7b67dbb19d944522e5d660. 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/AUMEV2262288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baae186615873f8a3de4b9c4e0e7c9a69ed56cbd20a8333f866296472afe909. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/AUMEV2262275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f31446965aa7dc315af831c3833ed257a2b47867a32c33823d46bd4b537c9e. 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/AUMEV2247134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2274bc6a2e2f17ff80f2d002a23320a16e086dcc80732963508d76e13e19675. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2227879.