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 0xdb6c0c82d98b32b3dd739cb22a30d3fd9744908cb88f7e741454531e6b185ab9. 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/35a82646-8724-4273-8384-6603051c4edf.json and https://artists.proofprofile.net/proofs/artist/35a82646-8724-4273-8384-6603051c4edf.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 0xd4340f68aaee2b72957c5b80994d575f15159c5846af4795a067f3eb44ca6d52. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBSMU4800622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36166b6bcc046af7bef6fd8244f79d43e325f905a7bbb933451def92a31b75c. 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/GBSMU4800623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7baee8a2761b3fa610e7454d004dbb047cfb385029761382df5fddfeb0d718. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU4800625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f95dc8973b7e4dbeb124957b002b156b0d1db508b31c648d8febb888ed33948. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GBSMU4800626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f9cdfe19e4de49a36ca9a4edbfca4c5622ff5a1c3d0c36b0335276acc89782. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBSMU4800628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01fa8d0f9ad3045d96f3dfefcfcc0c32d93a5caae229f8f9e32dcfd65503c69. 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/GBSMU4800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d1355a17de9e9ed68a432f4514f9272f2f58e171d9553753a5f6dc3c5892a9. 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/GBSMU4800631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4b4be15de819f86f9cb20990cda9bfb4f8b108c596a0a9f98fda12cbf97c38. 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/GBSMU5750935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec0e72cf1a0d29d01d60e6bb46d03bb6f1f4aded0e96e3da785ca050960c906. 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/GBSMU5750939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0305a03b3f35abd80988d907bbdd645ff6707a4c71d628a251b03a63a9278b2. 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/GBSMU5750940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1594fd34d6f5ed0132f77e609a17e5d1458c74cf479a656240961041c98912. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAED1947811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457daf5474af0ef17627fee1ba176127ed462fc5b1185041b8c6448e9509339f. 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/TCAED1947813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022cba0b5d669cd8bd08a71678165c0d89ed36f12e000b16e408a9629ed39ea2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAED1947814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd1afd849a51e1cc0b944fcbd45eef01971001d435a95ea99c416d67f8c4a63. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAED1947817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647384e99ed5e4924136e63bc4263408d457c87834899eb5b896f360d4f4909f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAED1947827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c08b65144186604d3ac7e0a008668fc179df9082a1edc4cb93bccf7b57f146. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAED1947829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0027b2a28fdf6f7fba78ba097aa416774a2b0f43605c46fe1c56532ce476836. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAFC2020011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0446079c0bf2d2ec1355bf1c707c6b5bbd37f3ba1b35d6fa3780e8d8947977dd. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/TCAFC2020012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416ff895e19cb3a0666b09c9a0d1da9c8e2cabb9cda457469aa88f2a2e4325ee. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAFC2020016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f00f9f2ac99e9be0aff1d6cfaf8bc135c8400bec7973f8ffff578e8f353981. 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/TCAFC2020019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e5a3cf6849e548d68025638e225b95fc57e5f34783a9f68036e7e5c1c6b6ef. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAFC2020020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7a80f60ccf5e3a27c276c93a3bc5a78defd6ae7b737a52baca5b79aa77dcff. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/TCAFC2020021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d92d516e0ca013b96a99e11927775a40af7a11a9e227109c285c4751198dde. 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/TCAFC2020023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffbce16d515f696dbe244a67530230e5e056d1a7d9d1394d3de87b8ce5dde02. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAFC2020024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe46660f1b75c60fe413f88cf46d9e0a0a987277787ece9516295ebaf12fde27. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QMCE72325501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3066977995049a738151fea94adf12589b550cff5e9fb27629bfa6f35ed5d78. 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/QMCE72325502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c9359c316a8d9a8934d2984e8224b346ab6c9661359c3fa56a227c602ce677. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMCE72325503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf438739524466541c4f57a15dc532419d0f641932fc96dd221c94f014a3b0e71. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QMCE72325505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd937a0f2bcd00dfcef3531ccd1c8effca922a3a28968b4c6d2fdacd31887497. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMCE72325507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee5c3ba1de905a65481000e7d98596e4bcf82a7838be467fd152a4c3cb0f54a. 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/QMCE72325508.