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 0xe45b47c9528385158842fbaea9948e508b52a3cc5463510a0e3f72fae9eee307. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e36b5646-84b9-467f-b944-a8ee345f3b88.json and https://artists.proofprofile.net/proofs/artist/e36b5646-84b9-467f-b944-a8ee345f3b88.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 0x9b47c2200875c9aeb0041b80c72629da9fefd418ca061562acdd1107187b06ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KSA012211414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae082bf161d1cf85f94ebf1b61788c31dcbc034b02f1184436567ba5b87f5215. 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/KSA012212904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb339516090ba26dfaf1dabc77c481e5565d2dc290e8f659ed35f8f98f32ad4a8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/KSA012212905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aebbd5cbbc48435ddb1ca812917edd1366ec8a6bd1e5105868b3dddca1dc8e. 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/KSA012213200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3950f56be2adaf72362a0d4ae158831aeef15f0845b0a59b4a6b49b8166264d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/KSA012213303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e53011a95cd870ca0f4562775aa44deca29fdc143dbf6fdd958812d163cffad. 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/KSA012213662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fa76c843b66f1bb2f0f5c4da3ce42312eeb64ab29487e5613310b8de5adc42. 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/KSA012213784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55713a9c7ab28228692656abb264a1c9071ac5687c4327cf4bd2329080f28da4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KSA012214312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173d2f7f4eb82d5f771d952bdc7da3171cd58923ac6e61fc81c3e6e579c77fd. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/KSA012214474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3779a6f5c52b0cbd2fc1955f17964a17ba8ac6077004e3dc5335573550a1453f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KSA012214710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936993f5d77415d77bdbd1f77c3c8f32669621d7d05e76b4afc84f554fc943f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/KSA012215107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e3cc3d960ca98b3a67dbdaf24be8bd320d222a97782ad6086840a972bde5b8. 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/KSA012215382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989de64d62ee57428071388e145b2150bbbef11fff17e96858889b2ee960aef7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KSA012216875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae79b5587f932feb7879f7dd47df962ad15118365b16285d96118c47f4d8a84. 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/KSA012217018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca3becb8d53ec0a49a0c6c29d917e297925a27e23b42505272e3e299e757f42. 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/KSA012219117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51005e98f9e6094b7d6173fa0f0df4f2827e5ff506e875ec1b8b3599ac7bb2e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/KSA012219136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42c22c987505eecd6135c89c3ee65e1c5655d26c6a5ad2fa95ae327bc02c88e. 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/KSA012219436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a101a1951403b2e77c5a7e411ffbc2c060c9d8a3571b025dd6e206983a1ce3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/KSA012219445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb542f25ffbd710a1db8a64e263e9a86839a257c74ecb04c1a66ed69f4a5a2aa3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KSA012220263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ff132e38b8e7a6c2eb12c341070dbad157039e528f5415cc26c1fd4f9616b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KSA012220764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2504ac22aa600822c8bcedb4b5f945210caf1949f152b531d303ee2fee825d8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/KSA012220874.