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 0x38e7cc548da50e59e1edb85ac34c65e1fba8d477be4ddd70011576ce3a58e5d6. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06aa9377-d389-4d1e-8185-f42cee1ce7ea.json and https://artists.proofprofile.net/proofs/artist/06aa9377-d389-4d1e-8185-f42cee1ce7ea.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 0x12aa55c01f5e606c515688854250463df759982ba0357be1b159a922c7b7d6f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DER371904601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d9c2d413b54b916e8ba4e4291815ec66009479eb5fc1e3346fdf84e7e4a4ae. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DER371904602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da79eb48b924ca186bf9be337f8730ca962963c0d1879c8bee9aa74baa6a89b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DER371904603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b7eee83d636411a1c6406f3ed0992e4c6065727d165f9586a5ddfcff2b9b4. 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/DER371904604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e358ecd4ca31b79cd03c5c5815988e1cc7f4ddf71c26233a7b999ac5754b40f. 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/DER371904605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc226201c0437b0b4d1e4924953b78745ef721cd0e56c25006bc4050f6e0ec300. 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/DER371904606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aa9fcbf89d700a1fb8bd2216259e2d515d847ed272a053246dd93abb872f0b. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DER371904607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7171f6b0047df1cf249670d5fbc782b4a5401bbfde343a09b822d24f4950570. 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/DER371904608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9a3e7e444e7efc0b60a5cd6567ceb021babfc5426b53eaf442f07143927850. 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/DER371590201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9396dcb41af3274a69b6b79fe23445291826fc7a6e4ca3c2526534b21093405. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DER371590202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3cd64a3dbc9dfafeb35124e25cfb42a210740db89761ed03cf1922cf92a272. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DER371590203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a9aed01326ae518e93ebf71a976ed40d009a48ac64f2a21f101f3cec74251c. 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/DER371590204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8906b74e3684c1f16e8ddbb313475eb79c444e085141512b6ba8938000fb581. 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/DER371590301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53be2ca6fbd802ee8761b915a131de3d95db5ca188892f345241e1528e0e971. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DER371590302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88c10d3727aef3b9c11dcf17cfd634f3d0a6df51a69c6d01d7833dcc0c0ded. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DER371590303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431575d926a0828fc2a316c318f3b5455abb3da4ab4030275cbf07a61b018c39. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DER371590304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902739ceaf5b9d963f4c327e179f9e72f592763633814bd40f82cb00d609f4e9. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DER371590305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b3cc640c7697e1c2757443bf6412197ef988b8cc9cf7816873700f5e0b6cb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DER371590306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91572d6a8a43be4bdc5e189dbfc06cab7de77ccebda929f965936a542f1e4fab. 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/DER371590307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10de5b91befed8f7a64845c0388b0fe51ffb60c1c187963402eb6df8d2427c9. 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/DER371590308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e4fbb388343dbce3e56afeefaceb5ad55eafeacd731e88a0c034312ef50ff. 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/DER371590309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec5a09721864081f9afd4ce94dff1651bf4635cd1de3f635113e3e1d21ce8dc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DER371590310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e298bdeb8f451c087a9b2ba6af9c4e2f0a05735b63a054bb56f17253c6c1469. 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/DER371590311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c16f3e19ca7531a1e0354ed82e0821c8a4ccad93e8017c7ee7b328062e068ca. 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/DER371484201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d08eca41a6a5f1977a05d69e90a3d1dcd3bf7d45adc9ffc8c92b8ea2fa89f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DER371484202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27c15033cc91b20cb537903482eee07b21e40a72a013613ee91aee6824fae1f. 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/DER371484203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b5520533146ae2af7547ad986e61419ea333c6d5686aba822f6fbd701e79f. 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/DER371484204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9f441e17fb04637a46f5f76be46fca030077ebcad7d219a796b54915044b2. 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/DER371484205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90746ff315ba5a2c809ad7e9cbb958af9a1973952a772fb4e56d74ba09e3275e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DER371484206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eddeca74d6020ed646ad2656daccf9354c055a12cbc56a23386d2eb9ef8778. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DER371484207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588f8813f3f95d533e7448d4bc6e2e14976f90d6a9302a71a580ccf86517bd1c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DER371484208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ec1b65a5a5e40134b28c5cfa84eb5ef36598280537fb7e53d3fd7638b93bcc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DER371484209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54e98bdfa70d6cd9d46bd868ef843c59254c235234133e91a71676eacc1784a. 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/DER371484210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d13ae28e18a7e2ff6c6d4780dbb21030f7f7a8b759073e4786a2473b64ad7. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DER371906101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e96f33eceffb60e564dff5e4908efed48e2872bb5bb639b87b8aa58d08086df. 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/DER371906102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ed495d95764ede3a52ea30bf6416785cd55037ed0f28742c1951b1f3719de7. 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/DER371906109.