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 0xed4255b320a342658246f890870fad041bbcf43d999b090a33144f12d49ec253. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1796a353-e8f2-427d-b610-160cc90d58ad.json and https://artists.proofprofile.net/proofs/artist/1796a353-e8f2-427d-b610-160cc90d58ad.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 0x31c87165ab78866e4a40ee7beb7d5a81cfd8a9b01b5f9916d0a4eeb249465a71. 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/TCJPT2220430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6af154dc25e7f6385bae086c6a67c4cd6efd15b288b34e425cdb9bfd7df03c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPT2220437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc228a6beee0c628e40d0a3ea76353530a7fc5589ff1805e9581cc23016fcc84. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCJPT2224253.
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 0x0ab7eb37863c0df3bfe03991009082c219e0b9c476444ae5e14ab02177344014. 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/JPP561101336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46431e98f1b6efa937101cb491ebb25c9cbb142b2c635413a9394f0723a1109. 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/TCJPX2392746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784302771b976e97697946957e59260e2129ea998acd5cf1affe4a076249d643. 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/TCJPX2392749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ff9fafecb263a7936b3384dc70399aef3fe505db0f0668232b1a63ca31df9. 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/TCJPX2392762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1de6f9b4cf1eb871ca07e9d8a5b72057796d458460fe06513ae38da1fe3575. 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/GBKQU2125902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adfa025e05e82f068cb4dc7280d59ca4d3404c7c0f8bcf4e89e3e7be2d85710. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2125904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a045c4057a90bafa689589d5ef22e8e7b0ff4569bd532ae4a00abf6858b53. 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/GBKQU2125907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640b779c5eab8c79625f27af67867fd83ccb8938e2b1edc32332f2ed59b8f7ab. 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/GBKQU2125909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc553e71e6d18a1a4b7504411ba6718a40d7772ec2272fb608de3ebb75aaef18b. 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/GBKQU2125911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b3c3cc9975ca26774d2a926ace7910d2eca614398df976723709ec45c54e2d. 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/GBKQU2125912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f86ebaf63c441c9f96b9f551c90414d69db9c83f53143de54fdd24cda9bcce. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBKQU2125901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04796f3d469ffe72f838a4f61763162f61f6d4332ca8c1234d488f2964868b55. 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/FRW889700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81493c12d62c4c326c6e9745cb71bd0e9b4cefcfcae1806e589bf571e6c299ab. 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/FR0U91204081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f33babb00815eb510437259768b0bac494f0821e1bbc14dc3de161a973d5f8. 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/FR0U91203965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe17ebf47623bb359817d77d7c8b87aa39f2a518b9cfc7f3a53f90ed7087fead. 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/FR9W11203244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bee932fa9384f999c2465e31b11fc3f19c185147436b8ec4886dfff96b24a. 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/FRW889700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d8fedf8fca36b2f9b1daaa4e114456d70d59dc55ab5dcb94737da55084111. 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/FR0ML2000620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72670733d0c4ce4d9a2e2839cab313c72321be23be78582874c9fa428d36d1b. 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/FRW889610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b62e90e4faa31688df4e58b52d2e9d9147d24577998e8f7488992f5d3756161. 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/FR0U91204074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e82725a7327af3f3cc0f472e09e36f41ef306afb627eee97a673849bf1190f. 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/FR94K9900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c03a45b4eccd756d3ab0faa547f025be999564e33b18c4f70b515deb3afc9. 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/GBLV62217989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbacc9c607e76b4feb40c0e522552b2b1866c89f1199e2bdc2fd4c5b86aab38. 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/GBLV62217990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea8b21248f9a65aafcc428b76298ba1a5b75a4ca5e9fa9fc3ac21a0346edca1. 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/GBLV62217992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c06badc87c867a7dd08beaf5f7400b131f4e82d7c0268d4cb22135d1d2024. 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/GBLV62217995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a6d03a11220ace4e28ce101fb8ffddb4bfc7a2daf7ba26ba5ec76c574475c7. 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/GBLV62217997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1eb9fe3643002ff17c9442530113bf38a7a6052b49eb6ad54c497bbe66fc78. 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/GBLV62218001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f90500e5b7f71f2055f9654a2ee291d36ad356364dadde1e0a3a0c85fb9bb6. 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/GBLV62217991.
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