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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe007fbd1b7c1ceabbca99dc929ee44b6f318eec74697cf8ef05c03dae4447. 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/2e19c870-01fc-4e00-b81e-250de7db29a2.json and https://artists.proofprofile.net/proofs/artist/2e19c870-01fc-4e00-b81e-250de7db29a2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e42e4825c2cf451a2bf0aa51a22130b249ec813be333830acaab09086ac4ab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SKB331500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91a1186e34cd4f432bde6faa4408e9795b9ef39c126a6b9dcd4d7311d87800. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/SKB331500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f0256e65952c0e00ec59efe67e0e9ce160c0a28ff89df3d4d90fac9d47ee7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:02:52Z), 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/SKB331500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf6d86e26f67043fdec9f913b285b4b7b331348a7d2d1899e9d315d6537bde4. 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/TCAEF1938512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ecb3bb4230edc30f94994f4752223bc0dd806359d2f6731a9f8f4f52eb7be5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEF1938513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aec3c520a3f5fa7afd0fb3aa2fd62390b1bfc642c6d0dbd434ada898aa7de7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEF1938514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9172655dafd28374b9a6514a6dfd9ece5828674670a945af6a839d79694a38. 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/TCAEF1938516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd433fe235e7b670bb0ff40f17a6c3c07dda21b266f420f7f3363caa45c1804ce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEF1938519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979281a66fa7e1dccb03168a70afdcdf280fc6a9b0fd874858a007a87a53f105. 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/TCAEF1938520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4be1b9142e019dd7515ce82340103e94a52d925ad9be862104d9ae8df1c14. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEF1938523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622f8af4b91a35e3fa89d0a97f45d0f44cacc86e4f39d0cb23a8087412342ee. 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/TCAEF1938524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896b048ce7c8596f5540c870ed5b2d2b95c9d0d53aa7599c1acbfac8287a226c. 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/TCAEF1938525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2b51fdb684ed18eb814ec3f40d8cc74ac42e85fa41bf137d7e033a15fe9cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEF1938529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c845c4a39bb3ea7fccda3d9a90ec818c5e99114c98659b675c610fbdd92d42e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAEF1938517.
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 0x1742e98fbd8c60e9bed95c30c5b3befcf2feee20cb7f2f43358bad2af2b00578. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCAEF1938522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0197f40fb45465afeafa6ba0150da530aa14393350fecd60249aa8937f44f7bd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAEF1938526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5ebf5c0e9de315222d96eed7d4e8b1836d84779ed0e4b94fad236628607f5d. 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/QZN882079089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4e904b2159d1e3cc7791a05664d51e7305f593effd84b403f835079ded2a70. 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/QZN882079090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7183c7e96bad62ce84d2079067941b2920da7abc7b91b33307996884c1666f11. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZN882079091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bcd05cfd07fa2fe47007fe02599e881c25e522a95bc39e85782b9db863a32d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882079092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb057031f73de9ecbe19520cd20e4c152998084e49c5ebaf038374c502d3c9688. 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/QZN882079094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55eefe7ffc38c827e9fbacc19033964fe0f301d300c6e5f4f64950103eedc7d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:41:02Z), 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/QZN882079097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d36b545f6ff46c4bf2e087b67a3e0c4068db93b2d563e536b84bbe7a1dab76. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZN882079099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c55e72275db12afbb065f2665f81f471a7b50d539a8be03d2a2938c0934237a. 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/QZN882079093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6b2c4bf7f59cb6d8c1a692362416b61f5ec8923e0034651970f8f502fa765a. 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/QZN882079095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858804bff796dc0235f12f7a33a16b63f3ec1efc6b9354c4de91e71e80429284. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZN882079096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4242e831730e700781e88bca746508b1d530319e3bc375de19feb320a04d10f1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZN882079098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9c52bf4a2d3b6c2cf8a8ab66a3323c4020fcf219706a0d9ce24ae575e12070. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZN882111887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9815787a74d768a71c2d3711135846caf2c7d29ffd993861fc52e003311d690a. 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/QZN882179498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f8b46b8bcf873893698427a3645bbc6b98af265e529c8b28da89f76201e51a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZN882179499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b7fcaf4346d6689a1d5592e100858ba2251c8246cd6488eac496a21e100ab4. 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/QZWDW2231252.