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 0x31bc9937eeacace95d03ec2f3b1001796578e75a2c3b99304c7a24cc1c79b1aa. 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/9eb4a1ed-02c7-44b2-9021-e526a5a5d0bc.json and https://artists.proofprofile.net/proofs/artist/9eb4a1ed-02c7-44b2-9021-e526a5a5d0bc.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 0x5c581d4248ff9adca5435383971f1022312625a57aa1566c05dcca84d6b4db97. 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/RUA1D1817311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb0fe4d2618d97deb4208d0d1b7a29f26c0a638f1c26b15fd3772582b41888. 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/RUA1D1817309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7696e4303be54020a91204b667565236658f0d3cde4a77dc2baa22ef0c395dd7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/RUA1D1817312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05ee4fbc06c27f3b0e041db3214baf60f69e1a592cd1a05f9cc088a70deddad. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/RUA1D1909659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3117bd1c99bb8c295c29afb324232f98cd8aa55d5eefdb1e5c77f4fe099a26. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/RUA1D1921153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c14aedec65455c283da3eb27d82179f0fd7d3935254e466ed8ea7bc444e0cf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/RUA1D1921147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45741d180c1be10c849dccb4320a783d6c61cea5670e08aeac742aec1fa404f4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUA1D1921150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ea0fff021bc1f78c40f0ed34595da72230ec461f422613493f35125038f24. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D1921146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de24d4f799bcdca82126588d53965f9ff32586962ac2e360ea9ce987f25c3a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/RUA1D1921145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353ad3d47184b140c0569fb3bd3d0bc5326c5d510d1b74a2a32e75120ee41fb0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA1D1921149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a127a17b4079b5f891cbaf7c1cbee81bf765c83bfefda6d40c4d2e79bb7585. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA1D1921154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e3c19dff225e4357fce77cf3bf4ce0ae806fc1ff250e1fcf17130fd6668e68. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUA1D2068613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bec887cde622cccebb59afeb580eeb4c84a6ae3bb855e069769acbb0afea7d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUA1D2103628.
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 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 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 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 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 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 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.
Акустика на шоукейсе лейбла "Сквозь", 25.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733979dc0547fd5068ecdf74f595baf4fe35701b294a08aed6421a658b4e0d2f. 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/QMDA62108282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a45a84d16713f4418cd4242c8c03f682fd9f7c457179de361d4bf88cad0f023. 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/QMDA62108284.
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.