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 0x00efbcfc44685577bed569e7729d61853ec270017efc3dfc954cbe318e363a7f. 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/f665e417-8910-4fc0-b191-a5f62a5c82db.json and https://artists.proofprofile.net/proofs/artist/f665e417-8910-4fc0-b191-a5f62a5c82db.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 0x0b76355c475cfa2d61a3a060bb03d3f20a37c6cf9ed7095b17e92d0ae6b53495. 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/QZFZ21935707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ec3273d18aaf1eaeeeb56b4a8bb40fb3f9e91c02ad5f021af6d57c50c7bb80. 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/QZFZ21935709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d07c0c073dc94c85500cc985f60a4edaffd2239eed51ff876a9d4d0374db71e. 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/QZFZ21935710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9832d904d5de0cd596db346bc58c0e13e2032d00ef623eb7e591a5035c55d464. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZFZ21935711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36d8ec331097d91bf2bfb52dbb5e805b133e41e2edf66489f89dae3cfa8ec92. 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/QZHNB2039295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3eede2af7a447c28cca5aa44462ecd9e7cf2f860a35a92c9e64a501fb2fe2b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTBA2378283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d76d3539ee9fa1f730bc74a79fdf9d27a11de50f3b6047d3dbe4cb492c007. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZNWV2271179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb971bf739271e47a18769a3086185c7f9bcdc4e4248a1ce480aee59eb43ee07. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTAZ2496700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716002e929a2809036f7488c25223f12ece2e5a0cc0cddc9a5f503db6ba62e33. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7S2440882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4a5e269c79aeeb4c3a1c8c97c3a9057ad02ef1232cacb4d9accea5db81bb5c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ32547527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f09b0f82bb53c092215db26044388151996ee2ac9baacdf96b2715ef02bb382. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6F2582740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fae4954845d822744e68796bfc510d8e2c2eb9dd58d4a288515f1ee7b0f800. 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/QZWFM2563632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0b689e91109ca99c6698ed3f45d2d89c7e71c6d10ab7fda20b18573e82324a. 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/QM6MZ2497366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0435771d2d8015c291dfc66e1dd8c0298ae7d20004fee83888beb22608eabb47. 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/QMDA62232212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c86fb7d133d39ffd012ccf7dfbea6d6604ca2b7e6d107cc73b13a42d8def2. 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/SE6A91969418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e1036a33e089ead82c787215688d448a98646595c84239a38b3f5330a9fa7a. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZW9M2235219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ebc4d3807f4799e3b6ef4f2d9beb4cb6a5acab108be6aa82e9fe49b2add5f0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES75E2202884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c86fb7d133d39ffd012ccf7dfbea6d6604ca2b7e6d107cc73b13a42d8def2. 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/SE6A91969418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae31471bab8261fc9907eb00c0b1ad332d19751c38dafa5f92865dfadd62566. 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/QZK6Q2053225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eba98ff04374d0bb4fd7bb79f0a0714351c9b7584f9d1ab25d6b30b66f6d9e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM4TW2466507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1baffb99199dce81498ed67b3892afafc53f2b1cd357c78e0d91e6bdbf28a2. 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/QZK6H2084339.