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 0xd91155d0a181a85cb787ac34b14abf37c98855ea14b535c17b25b312b70f0f77. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f796bfe-c6e5-4971-a806-5ae4272af294.json and https://artists.proofprofile.net/proofs/artist/0f796bfe-c6e5-4971-a806-5ae4272af294.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 0x9d59f88f6b12d51b806bf66068f51d6ae9ec0b1adeabe84bd0fd073ff4813cfa. 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/DEZC62105131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c405b10d4b5512dfb19fdc45679aa0d937252e02500d9adddc8621a00d3e9. 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/DEZC62105135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e820a4d840d0697a7908362288d7a666821b15afd08d3d68145fd2ea62ed2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62105136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dba0420debf4e5fed73abfd70bb4cd37fdbb0232f486afd7f3ef410bd885c1. 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/DEZC62105137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517dc4447776d2a3970d7ad8ca6221e226a7c117f64bdfd5c937e6e4c37974d4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEZC62105132.
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 0xf7b02ee01674577deaaa5265eb89c4d47ea9b8310fc32b94d82df0aeb482981c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEZC62105134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5247f81aa81f6235c7a9a075ae6e3eb4309259fa4894540e13263c62f778a0ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62445025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e980d83f27c55bbe1fdc0eaf84889054443459f195899b8d50dd9d3fff2bb. 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/DEZC62257521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1ceacf3e92a5e015f43011fd6706e37f8571d8b9b1f0d863fdde1813160da9. 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/DEZC62190046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353bd530a196365addcf726c7e349bce1a31c1164f4bc0c17b8d65c5138c09d7. 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/DEZC62190049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa520ddf264fb3d09f9396f27a763ebd059e534106b52b75e92b883d51a3c456e. 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/DEZC62190052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7160a9a7f7bba5fa9902ea65d4f62bfba1d9ba2afc8628fd7b5f08d6fdd6e5d1. 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/DEZC62190053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d1195043248de31a691c54cd21baff7989fcfacff9d88f23af9ee47566dd63. 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/DEZC62323182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ff416fcb49d71724439cf1deee07967eb7986d918425db3435b648bd36c6ec. 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/DEZC62216489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137d28f548bae08fcf63e9105d3636c20434bfaef09f33cdeacab1de3def7b1e. 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/DEZC62216491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f5db2185a6a3ffc1e08cc92129b6510447f4322c21d5581bc1c634da313ec7. 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/DEZC62216492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5cadf823b87c299b0ba8ec3ce44d00cf15eb1a7f0248a5f90325a710d2819c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEZC62190044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f71331d716f55dc496718db6b21e586ac9afa1ea699a68d75f6221aced49840. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEZC62190045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b20f4a67d8cda7fdc1861f089bb6045c0fdbdb1d8c0410703ad532f9a2820b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62190047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca26887b8c46d9acb5e3f14330cc890c2badb04d864d3917d1cc467c5a9838fb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEZC62190048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980cb1eb493eeaaa3d656becc0c03cbf927b6377b92ae4735c552a252f062cbb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEZC62216490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0862b9a48f06fa550578472ae8e69822fe78b4135c11d6d5b86ae35aaa57d3f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEZC62216493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb154c13db325646d46da34e7325eb10e32e11c2be40cfe9b69a9c23a035f68. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEZC62216494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26132bd51071cead068501f46a9e7fc9db3933129aebba4351856771000bc9d7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEZC62216495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745922b455deadc46a9755783ba88a188bcaae733e9bd40d688d66d14575b5a9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62204486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0c8c4c1055de49e93582c9bc5951fe6fbade7745dfbbb1e2bb367600ee4d37. 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/DELJ81904475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14d044ac297a622fb1d2b74ba6b1e626fd1a836f234f1a504e3748532711fb8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DELJ81904476.