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 0x79e950542481c7c8c2064fc018ab12b18fcdaa5dda695991513ee6970b6dc73c. 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/47407b22-978d-413e-8445-a44a49d08de7.json and https://artists.proofprofile.net/proofs/artist/47407b22-978d-413e-8445-a44a49d08de7.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 0x82c5f1a3883efa77b99cf480122c3bf0e8dd21780cc509fab244e2fa5b10474f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/NL4WT2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c197bbbd49d8b42441bf89c74a3bd6ce19c7cc86e763cd1945fa67db54ac72. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4WT2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd1ebbbf5244a0c2956114d027b364100125c540428dd1b060e3f10744b277e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/NL4WT2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87cadce06677d372f594859ea1920db9a3e53a1122d940fe543d6e44c9396a8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLT2H2100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc23246ec2b9d2b758000f19840922e19d964aeb29cdec6d0768437ae938a34. 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/NLT2H2100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca16b06976d68d223b47781aad090be5de73324e634ce7553cd560371ac278. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL4WT2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cbdbfe1c224d7cfc14bbfb0e40e4823debb26dbe58bfcf2145277df8d08a79. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/NL4WT2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf95eac04d5bc1372c909ba60419acbec52ae7a7b8335c8756caa23a0f2396c2. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/NL4WT2000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e799bfefac25aaeec407fda187b40403d47dc14fc1016b6301474ffef1657. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL4WT2000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb896753fcd6d730bd0ee2c1833e2bb08fd11008baa1058f77a73353010026. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM3DF2179983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf3389d5708200b5b3b12cafb3181936ba6a6b8da06151db0d317ea1222ba0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NL4WT2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0378293da99e0fb169bf3e5983a9335b7c24364d66c244e760d3d495191c7e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NL4WT2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e4e5a81ec0374035245aa89d3106a93ac40daca91816e4a78485ccaa2227bf. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NL4WT2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cadca7a23a18b1acce91e032b616093c0856312ff88f8c71efce14f25e64c9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US3DF2240455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61278638c10f055f73d608eed63b9263ab4d5d72dfb1a5ccf3a468d4984445d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US3DF2245115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c445444dd618b74f9c52aad2265e12d3b120eaaaac4d7bc02dd76adf59be7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLT2H2200335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a87e0787b418916fc11008c6b9a17a511b0065f4ab51ffd561084a8e417d6a4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/NLT2H2200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb994c1efb4562f1b1040810ff439933e5af4b572c951e5e67d73af4f69441c1c. 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/NL4WT2200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fe99b8d238ebfacfbc41c3f88c6fc7fba8d9283bae050f45066e89ff2451a7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL4WT2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a60bf08ca063fe58bb2b675a059d403fd227efe6005bf10e5ede2846de6d4b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL4WT2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacedf54d3b6d197acc4ab300fbe5c1e0698188d1ee1968434d0c23323ca8338b. 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/NL4WT2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be704c28f95bf889bdfd25f01e210153cb6bab3ec730b77ef8151343a8b618f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL4WT2300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5678878f95b01a974b5fb4d829e970c0cbccdb55af2bc4ad2ab11fb76c84265. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL4WT2300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d1f92e794dd2e03698c565e858eafdf08cf101e2ea1a07d04b9817048cd3c3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QM3DF2274829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daff6410f3908ca1bf9228f70267f6b3f7b7f9168c80126efbc7f1e5e424df1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daff6410f3908ca1bf9228f70267f6b3f7b7f9168c80126efbc7f1e5e424df1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLT2H2500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c7872dc09b32b5a996239b5cf008294c9a411d6f9c8d6820e03c0d752b5100. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLT2H2556004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae6c97e9a7387d2b0c65b9f1a2bd65e6d408f733d0c7f873c55d1e543178c7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2563867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423b6b15072bbfcd767f203028e778dd085c7c777a8aec1773f4ac9cc9e055ae. 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/NL4YD2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd1a3a61956b16452d39b7648e78f3fd472c2885d534aacf845f40b89d3d2d. 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/USANG2228436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91978c768781cff0c520d8a111dd4d253a55961c6f97a53ee33869c92caf09da. 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/US3DF2472072.