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 0x052aac52688a9a197f08105614294e83384a5cdb95a4c7cbe9fc1a0b40c87f90. 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/ea834d51-063c-4d1b-bcc8-8c0cce701e22.json and https://artists.proofprofile.net/proofs/artist/ea834d51-063c-4d1b-bcc8-8c0cce701e22.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 0xe6e6d18405bafc76788587e941c9f423f65f91325c6b325166cedda8a2dc7b57. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBSMU8491940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e9b648a94f57a68841c265a3ae30db1383f4e4dc0c08934cd7018ab8fe4fcd. 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/GBSMU8491943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd396b4abcf67f82e1f8d8c28997ce838f1cdbc20304a2443206b2f237b845f30. 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/GBSMU8491944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ded8fd4e976fe36ca193cf0cc0e68143e2c6be0ca15897b12fefffa4d1718e. 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/GBSMU8491946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e6bc5cde3dd26d625b1761b3ae826a386f14bd09bff532744a894cdf6ff9f3. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBSMU8491947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050c60710a2b81c5b8241cef32f68d1fad16a740a60bc5709a83d04df6fb443b. 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/GX38U2222149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d2c729b977b6567b64a8c2fe603ccafe63598d07a57314e08fbe5749e57c2. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GX38U2222151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafc6c677731c902c1a6b12f1ddba439607beaee82963cc2c5f0f8c072697cc0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2222152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66758547e429151bd5298d3e4d00119091ccaa2d6ec70bbc2ce926972515b078. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GX38U2222153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514c849b82e44a3d0258f0bd838b63eeb4c1d450a81f1a62de7e0bfca60166c0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX5MX2259381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2338d894f1a6cf10ee60a1c735e9c69a748b281905120b49d63cc6952055621a. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GX5MX2259387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9d9f0fa61bd6243c00ec15c94d80ea4aa5d3fcc61f001a7fc44b7fdf52b03b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX5MX2259394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6801e1ee77663e217c4a2d49a5c654a3db4857f85ef80b1f2f4fdcbe25a4d827. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GX8LD2397245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3a4c88de59eb8d37e561ab29d04c3c2840319b4e630ec31f70ad8ebdeadda. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GX8LD2321360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad28c6451ac133e9e390c2d85702e1dfee2baf63dffea3808b42ef1e95a03b10. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX5MX2303473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd072d015d00614f90213902ccd0201136f2a9401cd86865ee4b41a74ba56b568. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX5MX2374650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b23923755eb3f021ebbe68401c9698821ac797291558096cbf01fb1c916c000. 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/GX5MX2392004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4cf95ea54a8f1451f7d82bea1abb4cf61cf3936ce74b108beb1166c74a2a8. 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/GX5MX2329733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf69893256335b2e8b3fb2ee8545e5a8b5f2c3fe0f0d76ea0c13de23ce8a0811. 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/GX5MX2313170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e385f971b178cee3da920cb3fc9249e08fd89d646d638137f6388e7b7a51f1c. 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/QZPJ32318020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c4388ff2bf35339aae97121a7c5948657e7e5e0c8f8c951b4309d74d4f0350. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZPJ32319176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec2eb50641279a45eb8f7329d8de4342aaf96d0bcb9e298120e2593f9c1c5f. 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/QZPJ32378989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37badd47cc083cf6bfad58fba72fac244632d873209e395bdbfffedb93d6d48a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZPJ32378991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a995942ef3c44b334bbec261f6074a8e165920dccab52bfd483e8ecade1e4ba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPJ32378993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0fe4d386dd5d5b0d04cb20d4acddb5715fae7bf86d48d902634578146a1b4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPJ32378994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49992694b3418089107716fcbefa33ba0c29ae864396699049db33ceec7c480. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPJ32378995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e3ac2bb2a44260a7029c1d75c43f04f06a76f83c2c8b4f1cedd39eb15bb827. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPJ32387569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77537c75fdf2212253c04a096427035c970603fc48c4fcc42f688b900bc430d4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZPJ32400631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded2724717f0730f07bfe84cfe13637322b742f677bde88178ecc2bec4fab7e8. 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/QZPJ32400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5a37b6e16f62b782b033817c237f5134905713f452e34ce9eba0d14092b3a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6XW2524467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90c27ec6c9cafccd6ef10da30fb3c861b475115c304a1ca44f48a61b9587d4d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6XW2524468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f3af525e810c780ec2d98ea3dc7b8ad8e6a0f7ec7afac5cf6b8215572af910. 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/SE6XW2524472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30acbc1d587382c12303619294537006cc43297b1112b45329b9594116d9b254. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6XW2524460.