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 0xfc7ebd0c9f3c57f027c1600b0f4e6bb09445c059f50e98d4f51b3eab0bb3b85a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/344c02f4-f0a0-4708-bced-e24f2b784b54.json and https://artists.proofprofile.net/proofs/artist/344c02f4-f0a0-4708-bced-e24f2b784b54.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 0xce320256413df8f57376f20df8f7fb1dbb8f39d15135c97b4240e59616449094. 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/ES71G2015228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5185eade23200f3fbf0134257c5bc2dfcb333c37d98cbad33881c232ce307c. 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/ES71G1913433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e16d19b5ca1bda0acba2edbb091335940a98462446320dbde12a5e4fcd88c3. 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/ES71G1881544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b89ec46e6ca9e2acf293e1830f8e914c71bba02bd1124c8a1319218f5844d76. 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/USA2P2121645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a3eee83f0da4060d069fe3a4c3ffb6ea10369d6d6e061bbf9edf26d223ffe. 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/USA2P2136925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e69cbbcfc5a2f3c9ed98d1a18f95e2fa2eeaadf940d5b4653a978f00bac68a4. 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/USA2P2136922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37659ae479e39bd1fda67f194c03f4b88ac7edc346ce964c0e64b9433cb2e7f5. 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/USA2P2136914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba27a32268dc1f97875df9acfb869e071de124b22090aecb44fd8862fa61fbb. 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/USA2P2136915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa473c339b4de0d9fafce5183122c977fa461ec82934d8314ef16084ba36f3e99. 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/USA2P2136921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269cee6b878b96627f9d23722a65a8545fc09f2593c7cf4de387cfbd517daa11. 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/USA2P2136917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776bb3bf8ad0fa8ea591ea95bec7828630acf5ee77f45b7f25d8059549c544af. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USA2P2136920.
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 0x04e812418846abdd28450107498b57fde748617dfd681c1225634c4638232490. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USA2P2136924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661f2aaf3f597cf3ad6e25ad49c3e37b26ce485994fa439f1ef274fab68a490c. 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/QMDA62497367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a72e1cb91449922f6e84fa68c549bae9ee78abd29614db3bb5e7060fb02c6f6. 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/QM7282494561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eb49e1e05ea071f1a927293a7e5ae6174277c9d7a525b6d843ca01a3715dfd. 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/QM7282491315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b61ed0a7bd9c4c27cad247c9a420b5af14f8ee31455a5a6fe69fc3fd9ed263. 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/QM7282460535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae708e2c9c97be83ef94f4687bc907870eb37d98c37403dd2d318504efb1a6e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:12:54Z), 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/QMFMF2218713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8018f346dcd699f8185509e75ca1f4b89a3764d4d86eb9691f7a071fe56546. 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/QM6N22141132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fc594d5be8e563b67ef2d536216ba9f1a36731ac9a6bd7720fb7fee736ad64. 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/QM6MZ2187343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02376b6b4f6ad333ee450b708de6c7c91168ce8a946951e914bab1974c5f7b7. 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/QM7282071789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be18cad86110ce46ed64a322fbb430934c6e4dae59702d84e095aedb5ab8d9e. 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/QM7282031467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06e88975b32fde362cde91c36126d5aa1b9c2cabcdde8b1363e439e9a03f40b. 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/ES71G1951470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4175eee6c330563496a247fa063dc94fcbb8ea439363e4c840daa13d30e615. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ES71G1938840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e74ee69e1f1584956e858f5cf1f67eca5af3e2d7c466b2c94f85babb8bdb2ec. 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/ES71G1926932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9114ab4d52812ac011bc410c883e3d1060c95ea7a9ad2c002cb26e00bbd12d5. 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/ES71G1924802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a8956e42f260337505d15a546820a00eb44ed1cc9257949511215a0b1d8ea. 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/ES71G1910894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1abc4e2ebc4e73cfaac2f1d31f0da539ca9d3469e2ac8d664e1c87696d77f6. 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/ES71G1907364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2f94335861fcd4eb56b4f701d24aa80dc0ed83ee7d6a1704b791b2017b7c1. 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/ES71G1860867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835d914c6cffa9bbd4b8121477a54ff26df1898564170a4c529b3ae1e18a66d1. 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/QM4TX2199631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d2c06842a72b7747c091b35fb06e2f21e12d5c590331946f34dec64be7d56c. 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/QM4TX2199650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25913e6aec4b98b0ebd0a020367fd10992ca2383269718df67c5f6857ee1b390. 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/QZNWQ2040438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f711d0efed8138907751f204715708784810ddb939d7c8ee19ee6377e1702e8. 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/QM4TX2199652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9f91804adb4865aece3087c2f151f5729edafd1add4e9887347b8f23f7f08. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TX2199653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aaef4cd68d016a32bd420c2cddb6ed2e1d68f97c8f1e1ab84c53689d01d631. 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/QM4TX2199665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80a772ec53af57fe664fa6089f532812757deba6aef8db608a518f7fec826bb. 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/QM4TX2199667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9bbc8edcc8c3baf67195ead1ce6029ac25bbaa57a18bd8217f9d23b2997195. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TX2199669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2322adbeeec9670b06f5f0ac6c0f04dac1ddc1bffd20f557cd4d9fb618850f. 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/QM4TX2199670.