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 0xcc1339813bbae629c07519814af745d5ab9cef51024548dfd113fb7871ff2d46. 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/3562a009-9c1e-4192-8d94-65caa45635ad.json and https://artists.proofprofile.net/proofs/artist/3562a009-9c1e-4192-8d94-65caa45635ad.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 0xb64d4cee476e49b95ea69e7a00e1859354fa7080d80ea6c6226057e118055ff6. 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/TCAFE2084890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f6f971d2174f646984e31d5a0dd2d4f81ba3cc434800f388155e6b3a56f75c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAFE2084891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dd7bebe21efa4a64d7f0f59ad51e52784a2dab463ec2f8666202d7dcbfbe45. 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/TCAFE2084892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb230709d5a79fdcb83cfe1fe373860948f66a3ef0e76bc04aded0f9effba1850. 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/TCAFE2084895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeed0371faeab8371162c4a15efbdb1f653995c1a7638a91d9b3ce0afa42d72. 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/TCAFE2084899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d1d74c75defe485559a0cd3d48aaa0bcb99e444327fc9a52c0f8718709c86. 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/TCAFE2084906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d71d904f379f8ebe39b068c666c263080f2d7be43231b7a30266e25294168f2. 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/TCAFE2084912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023993b01e10a265fabee6e812b4614d27e4a2a5ae11f229a99f0e5260bcc8d6. 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/TCAFE2084914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af5e7e5df8b11d11fe8f7228129f8a52ffa2d0e6cc57a109a23280c469ebad2. 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/TCAFE2084918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aef1305c661851cb08cd4dcb00e706a2b2f614e8875c89cde04e2e092706853. 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/TCAFE2084925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19735bd759607d31a70d736ffbfa46e2e2f997107bfe05fca065b6fdc671b3. 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/CA9NB1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed53e271d39f0cc6d3bae5f847dbe085a72700a77ec15dccf984ec4c2d107b. 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/CA9NB1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a14715ccdfccdab61f4ea298ccc5f6e4f38bca4f18ad8ae21590d32e12c486. 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/CA9NB1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f885f9a0b018a908289da660d1ad02a6aa82719e14c14038c2b74fd73597602. 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/CA9NB1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5944a30a7ef4de514401a01006880b925314303e7965342f72db570e380a85b. 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/CA9NB1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ce334b9fa138015e21c21ccbee61b4e8fb3fbc5678720fbc3b2056e57751e6. 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/CA9NB1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff122ee785c839c7df8704c261db35fe7021e8f737854fcd5479f7a2722f2f1. 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/CA9NB1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a886971425465ffdaa41473802d725f0aca69e28e2940fe43256e9fd499ec0e. 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/CA9NB1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccab26292bad9670d5a95bcc286466363a4449f35274643734b77894f1598d3. 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/CA9NB1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f85726f38f4d27d59d598310c96cbf96775833566cd0836c2a18b8d86ed118. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA9NB1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70a6ff187705c91339fad8995a6ca5420b3985b43342673727185b83c10fb95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA9NB1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30293df9fff0462913edafd52549dcc961a69c48818bc650cf5f95c4cb51dd. 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/TCAII2464428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5378800d4bfa26dacda7f44a38e2450469396ac062a47207ceffe79bc1ca50b. 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/TCAHQ2343866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d05186867b9f4bf5a8e8e995b2a7c19d09c600ae42921e011f7fa8ec3b9074. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCAHE2361409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4193e51e0b5a59566211aa565cba232ceb269ade9a70da8793a39f851ada5. 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/TCAGQ2283028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb349524b75817b272087f6aa7c521231dd8611bc194656367a3809b9a93a8efe. 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/TCAFG2071388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a0ec735b5a83ea585d2e8beccd3f94f8e583c2197efda455cab413750ec957. 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/TCAEL1934346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dc4cff0490385e79251f7b7d2a6191f17828b6a69bafc46574ef2ca528fa3c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAEL1934353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0fd46dfb43398d10bee28237d1b84ebad1f9970720e09e001b3b1205274fb0. 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/TCAEL1934355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd8b63eb7b451e6e69a1090d80c20e6f136ad7f91a584876e1c31105c157845. 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/TCADX1899688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c4f0055fe23cb2a8741f958ae19d336a237d62ef09e98c8f21221cf4fc39f6. 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/TCADX1899689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41728363bbbd3e9b07f3abace2149ec12c84d8409d708a00503639727f85923. 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/TCADX1899691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1097216c7ea3cc1d7ad7dfd5d34ce17af6ea91d5a1185b6f6e6ca4cd8ab5f0. 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/QZFZ62535336.