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 0x3c1ea0072d1c2d5828dd12392b1167d28cdbe8d23d131538739354a536c88e18. 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/7fb86ec9-c9e2-4d17-bf18-43479710344e.json and https://artists.proofprofile.net/proofs/artist/7fb86ec9-c9e2-4d17-bf18-43479710344e.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 0xff80602d78ea7e1391edc103099e781063bd73156b42936caf8f434186e7d012. 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/QZTBF2369971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b55e1f9dba6192babcb37fce5e627fb49d4279440138e126f24ccffced00def. 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/QZTAY2395677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a7f0ca7018b5aa771ccca5ec90886ac23fcfe178170ffd6db888ec9ae2fbaf. 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/QZTAU2335727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a1a284cfa4a5fb1037e5a5498b80bb5e8f9aeadc1da26de76532d3d1a262b. 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/QZDQH2357849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3702ba0511aba0167f01dcaab49691a5228d9659e40bdad48f8ce66410c191. 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/QZDQH2357850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48efc1a3a65c44b3991f5dc2bfad18c34fd90d2138a56dc81ff3fbd8247ead. 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/QZDQH2357851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ce211086db0cf8d6a2e19fe1eccf53b3d440174336a2cd1b2097a5fbcce6ab. 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/QZDQH2357852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a41ca64367c5bd943386bf9c3781941b02b25ad6bba5d40197f07a0a8df9b3. 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/QZDQH2357853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f326d20b978b47af677845a0c5c8484ca0aea2f9074d4f98b497498172ed4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2357854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ea0332c82a998cf075a3b89dd31761012ca44544038d10730142dd385b53f. 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/QZDQH2357855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329294a0dd988b78cafb2c137081243eac052c7580b4803ed2b6eed07700f10c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2357856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab97fb602be0932ad1896ee15bca2fc455b741955461152019e03ba7b1eb40. 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/QZDQH2357857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6486bef861a947f89b01c5386a4bec9f2569b77294fd0005c857d9d3fb722104. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6TI2190141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406ba47a675f33423ef6d24f1d1208c93ab0dac23aeb8cd052b5ac60b3cc258. 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/SE6TI2190142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd51b6f343241ac58a4a7695fb2b85f4cd0665df4a5ee7518c818cfea04fb13. 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/SE6TI2190144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782a6cb37222d7f3d41069af06dadabbb10e435aedfcd1d0aa180a1a650f7af. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6TI2190145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29f7e948c0a8c3971f69081888b419dae53cfe8052a32d3391da5f417ed5e0e. 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/SE6TI2190146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4145fba5eed2d6430eeabfec4d0e463438e82925518e39fd7993f8647bcfbb80. 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/SE6TI2190147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f2b7ca1bf490f0c40d52893de3bba86c85d1d9807342a9ce27569d8199240. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/SE6TI2190143.
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 0x7f1e27b3aba41d0ed9a0a21c2ce800f204693635dcff0788cde50f5bde837ae7. 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/QZDQH2393525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bf2e02196c75d0be983f2d22e0048a74fcf24cf9eb3939a410ea0583a8e7a1. 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/QZSYP2359658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260d656a8204ebb25a2aaa19b01e46fd2cd4450f94904ecaca3181f7ac5ed7d6. 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/QZS7J2395871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2776215886b3aee583e3b503293b015ec2be3b27b39c1ef0826f969c7ccced. 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/QZS7J2325443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0136c7e7f68c8b7e924d193fe809e1cbc1816a4d44735a4fb2bc7dfbc77ab7a2. 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/QZQAY2382641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a5059752a3eff6216f6e711530153cea078b8c2de5c337467e201f7322a4e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2385416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85703e1926923aa7faf5fa99c820c46f2dca8c2cfc248a85d45e7b58b2c5aa6a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZQAY2300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac9c626e3388e1ec9a1789a83c638e529e5337239e2d7a80f6a8fda9351b81. 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/QZQAY2397159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5786e65f26c45d9663c6390778d05885d3a92e7ff4447141ce2ef324e6508e4. 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/QZQAY2392919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479f175859f9ad0d8f676eca86aaced64ed6f45f8af377ea678d18f1a0d80f92. 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/QZMZ92347958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd24f3dacab9c535b318f67eb77d4c218b3e9403f0f120b9578f21d5d08af4ed. 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/QZDQH2362456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a46d5b04c6ea1844aec65b924d38d3108cf54d13d7e62da67eb3c85bb30389. 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/QZDQH2360693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e67096438afa81f962b00037f178eec0df307867ae9cb20f7e4f1ec790f46f. 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/QZNJZ2396165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712111bf7b69ea1dcde68adba6607dc620e52d96dad1b2db0a6ff0c6a2b753ab. 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/QZPLR2353659.