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 0x3e14ce0d0fe8a7ccce19616ead9bf2ff201029653173fd10cadef5870ed1de5a. 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/58d017e9-07ca-4244-9a1b-c984df877495.json and https://artists.proofprofile.net/proofs/artist/58d017e9-07ca-4244-9a1b-c984df877495.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 0x725de6cbf97de6fa5cc93ada7022268099866d50f89e2989bc2e7db60e25c731. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWY2037483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a339c3bac3479a46ef85e8d0b0352aef36634920c4789423d5ec9f2f276b6d4. 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/QZDA51906174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71b8c545eaa56857c944f8416c1d60a2bcde40a7cbe0e27b14caaffd4865137. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZMER2008521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c02c13fcb16bbfc9a939128fc59e26f1d2f3f0c82fae3b8aebc0cd4db39145. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZES82033517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a531c9d6329d56e76c8b3fae16f5c4b59fbded40f16a3a1b77afbaa6d2060c4. 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/QZFZ32174336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf99861647363a8a98003ff7c1da31f67606f8ef0de60cd139c9580a166480e5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZDA42114754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c79cebf46736f4f7d85fa930a349d8b0fc6fb5feaf0523d163fce398faa06fa. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES62152531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5998eec2ca91a72307f649864a87aa6b49349b05606fcb47a6f8da8982a2a5e7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52142772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73787411a969857101edf0f322b5290e21b2456f032f728e2ed262555a611414. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN92160593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4569bb9ab3634f4bb2f395d88f806f9d194a1a3085d7d01076ca05b3824f9162. 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/QZHNC2155336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e517362b9edd4825706a712f3d03206313f98f205a8bc899ff92ea083d9adf. 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/QZK6H2163108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1543e11b7a6752d75c6af838a8d70f32f59c36996adf793c760eb73c35cd50. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZK6F2128716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff88d6834a175adf5a5699b80755f71f57b7466a24916a25201dac0e584f9842. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6F2155067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dea152fc5dc72989eb2f3ff59e8d40ade701909d3395993c8a35b78b5ebf3c. 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/QZNWV2193770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8388ff36d88098d2577c5bd0aa0c0d9adcc8e94d313e142e342e003f4b3a2996. 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/QZFZ32226113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472972a6260ebdbcd318931e864ef08c37764e2dbb73da2ca3eae32c7d06fd93. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA72260130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a58063b466d9373df11fc6ea2fbcab20bc4b1889820b16d85c1c5a1e1e78f1. 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/QZHN52222521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e251b13ef345159c65f6c2c17d8f6981d3ef4a7dac1fbb961f6fd39110568f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHNA2270892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224a53e6d850fa48e24faef2bcfc2a6b3b803f952a1add9d7939da26add92a2e. 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/QZNWR2287721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3abe8c3609e5ba9a68b77bc52be0a7fef7a43e8f62dc119fd15b7334db60ab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2293504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b530cfe30ad047344f06c9da0e2f03b9b6b8b3514be102046039a156c0ed4ee. 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/QZTB32250796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5381b7100836d70547aff806a681bc00cb35103897ab558ddb38408431a1e32. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYX2376197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ab67e3ff794a43c523d3825f74882a85dcda50d2d99e2cd69c4cf0f618f3f5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ22362976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16952649130630725b5d8069711c281d6f26a564f4cbf5db9ffa59096bf1cceb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFZ42315238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667aa2fad787cd8a410765fe16cca7a7c3ee179a996b3117f15601c9a9628f84. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA52385371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb16a16f11d372dec169ae9fdb089c972f56279bd5b04af7b96352ed1d139ded. 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/QZDA82318920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc66502f7a0e8380b581b997c02809dd0beddb4a296a878a2919c3b7bed37fa. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZK6P2331061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34bb2dcea6f789358a0bfac002ea68861cffaaebd7ee637ae0e85f47092cee3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEM2383891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f442c41b204405a16c1ecd5afafa880eb201c1a10969ece4cfe120f0a414803. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92303671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24134125b28072cdaaad2588672d167fca7447559cbff5b8cddb61a79576c377. 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/QZHN32446443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a6d90ac2d97b4c7e3788dad5c7c9bb4fac511be3f22846eb2c1c196a7c2268. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZNWU2437807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366fbc9d2eea9d01a8cf5c96200be646550b85560b2eb5ee820ec0ca6698d0a0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFZ22569724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc5a3ca0c1d8cc9b7df7903fddebd45abdd45c7f70cc0025d7d7fa3598115a7. 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/QZTB52555659.