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 0x98d6f1e6bb730962ae3bae9a0aacf36b5e9798a01b378570cc61dfda45f3a22d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28a42043-0ce8-4587-bc91-afc2c56cbc80.json and https://artists.proofprofile.net/proofs/artist/28a42043-0ce8-4587-bc91-afc2c56cbc80.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 0x5da1cb5374bf0c0635c80e3c1e32e1c07bb1baf9d7ed840bbe2a0ff6631f1850. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZL5N2451180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e10cdc0c6e36458d0b211374023653ff9d0133d80338da093ad9f40ab54f83. 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/RUA1D2438830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e66fec3682fdc87f8ad0fb5d55bec224c9cf42a008809533d94d698ef6eda. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/RUA1D2438831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7c5eff7af3fae2f2bd718d9fe871841cc81370a0ba4a6ce39f359289779a86. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/RUA1D2438832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970c4cd0e50da6831a2e12f8ba9dade12096754b2df409ed693d01776443315e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/RUA1D2438833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d58dd930360cc43c3a2e73d6154e3f403ff85b6320da4477c8925ad194bda1. 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/RUA1D2438835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d01eab67a1765c1ce15f74955bcfc873412c9bf8f58843a385bf4f99ab01d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/RUA1D2470014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee837c62d8f96e14ce149fc69243a7907c5a35068629a62bd939b08d00a3c812. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/RUAGV2407635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e662873758270e3e33129e10db24f01ad9981dd1fb78bcad6f9de466c91b2c. 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/RUA1D2311225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e65ddba8cb0e507ec487db7b65ef986c1dcacb4ebb8e6dc141ec64b36d219. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/RUAGV2405725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab84dcadccde3ed6fae09a3f457af6046f878896f8ced058949cccd98477a5. 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/RUAGT2325105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aae28db3b0830a3e90142eaa1bba43c9062375e4e8660154e7aad0d5824630d. 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/RUAGV2407375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbbb40f83822d4e1a2ecc9f4d2f62cd5c6b9dfb66f696e234b194a89212484b. 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/RUA1D2464980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9410a8f24fc489070e2a3dbe8667fb2cf69ff813c6810d884870a67852e01451. 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/RUAGV2407636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc585aca8069efbd0c5348f717ceb31d961bc4266892fb8fe85f21f47c9b7eff1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/RUAGV2407166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f77086e7be11cb6983d5f05c2e714f4d61c3254231a8bc9e728da6d2f165eca. 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/RUA1D2470015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f5005967a30f771fd1752662271b2da4161bc0a05c6c6d47448d2c39bca9ec. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZL5N2441110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5306b2723b2aca1de8ffc6fbf524dc2b6d370ec38920397053d672b8eaaa3092. 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/QZL5N2441111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b18569f936c6549ca1f36120d4720ff2e989a81eb57d7c9368301097db49dc. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZL5N2441112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1442fa47d344e9b8756ef76673b7779cbba365ef2e80c99ff7a8570c2c9df9c0. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZL5N2441113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c3ea6f0425df838923ea796805405f2d77ee0b5db4f77d2e7419b003ad111a. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZL5N2439905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf431278b93cceb3cd1fcc1ec62497c50ce44f775e1ae7e0d15ea6130a15ee2fc. 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/QZL5N2441114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3338846e21065de972f40217279006b989224147eae495a378632bee4a30de. 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/QZL5N2441115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54a4de29da5d6cd2a87b95ee8bb06b0c5d5fd434a817e33e104ccfb257e0d5b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZL5N2441116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9663fa3283a77bf55727b5581f3e48c20d303146c29fe98264ef27b6496d5c6. 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/QZL5N2441117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1fa979926ac497841fa77ea91c9f84f09b42b8d41cde2eb0a053b32981b4eb. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/RUAGV2409412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aa5f79f595ef1522d95b61efb32f6f799556883ed2e0195efecaf8f00508ff. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/RUAGV2409413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80e3428fad49d62da3a4d2490094164e107d4b8408b7024288ed110e2098c4. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/RUAGV2409414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e72cfc525b156f000dc32c9a24a38e4ec27108950f8ed488610cfedc4b6512. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/RUAGV2409415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ef73a9b829609a1661315e0c372e1f32067ac89849b932db560704708c3890. 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/RUAGV2409416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870fe1b7c81a097778282d173232b4463a1f2c0e19efa51c08d778413e165776. 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/RUAGV2409417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1824a7613aaaab1131ba451f64883310afe00631ad5b8ea3ceace9d8f1f34f39. 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/RUAGV2409418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e8b00631af12de7ffc7a345b3a5c26cf1d9cb26dbfafad7d445b04782d0a4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/RUAGV2409419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ec625cce3e041e0938df41840465ea1f7a64236f6ac9d258bfe4e365ab5022. 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/RUAGV2409420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0d5d932b56dc4adfdd37ad31a3f452fb459c06e06c14003b03ffce98b37d62. 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/RUAGV2409421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af236041c2ef0509b5b79d11660e2ab6f50106dddce8c82ec119e653917735d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/RUAGV2409422.