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 0xbca79f143f3ae27b4276987d82a4df7a28cfe07c5aafebe93a196480a2112468. 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/f43a202f-c5c8-45e0-a13d-b9511111e380.json and https://artists.proofprofile.net/proofs/artist/f43a202f-c5c8-45e0-a13d-b9511111e380.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Won't Let You Go (Remix Contest Winners)
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 0x240c7a8a686c46d19b14845b880d786622eb224b1371ab0ca58ba56425e44450. 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/NLM5S2201650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c9e6eae254b35dc86ee9d28f7c550f6d482d0eecc839d5e98e59fcf56ef45a. 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/NLM5S2201649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c45c7a1facadcb2ecdf4401e8d31de2fc39abe24cde51fb5930973dd47ca70. 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/NLM5S2201644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8191f26f5f8fc27719693856520357c47c3b9a81d2d81396e0f14d0d4d01108. 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/NLM5S2201648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cb3468ca31182d0c5ff65d458136e1241d8a88379306dadf1e08520b1dc1c9. 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/NLM5S2201646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b22fc699b46a1f7aa04c14d3417aca2d5c3d6f89518dca93fd52d4e7f7a60f. 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/NLQ8D2101469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadcd34fc37ae762e9fc4e98ed834a7a3c1d81009dc975c241b1a0c55b5dc326. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLQ8D2101480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3171448a45c32810b0aef452081416b3afd39082ed9ffad713d4e92e6d884ae0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLQ8D2101483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283f1331f67a0ee18d9d371bbadbb84543f75926c1209272f3ceeecdd1bd1d76. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLQ8D2200482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2fc7ab63c9684c3726dfb1c4ff83559878a6cf72f0460391bb8a59badb19d. 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/NLQ8D2200498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacdca192cbc6519a921cff7f9a15dec4df95d641341d83f424539c7ab3303f7. 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/QM4TX2234157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4bb18157290e827d23df5fabbc0209f97ff21bdddf2020ed9973c66f7428b7. 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/QMDA72143777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d733f982bf72f167902dcd0fdc8ae9b1c2c2dc92d64932b5de20b7bfb0cf68. 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/NLQ8D2101304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef65a2fe898c4eb45ad5ab9adb604219bacc12267069309dcf127be5d746d5f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFO2117306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203db5c11a021514f9f487d6aad254eb23b42c6e93c12f3fdb18e13f56838f40. 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/GBSMU9706298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6170df2e310bb347279c3967f7338f836df614dce2b2f4d4869a746ea2743b. 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/GBKPL2031164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4372f6f7a0ae03cd1194551e9018df1577ce3e4915426c105dcb2ac18352a4d. 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/GBLV62013664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa605c4e061126cd5d2b84fd845bc691016fbb208f85ea9b89c3528ff6f2992b3. 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/NLZ542000935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de766130a4c50bcb2e22319dae232905c3233ddd3a0595aae300fca6d02be1. 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/NLQ8D2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7d4cbd7d07acda01978d5b87cf726365ce4a25a5cafe011877e0abd426fde. 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/NLXS82000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34be8632cac34b37103765113351800376e79d6e50ec6b7bc0e41327d8739b69. 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/GBSMU6897110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff9951ee0d678dc7a1df37a9883b20b88e5778a5611c65704e195f9c083eb6. 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/NLQ8D1900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260c112c23552e1626df8ea8aeb6090818ad955be93430cf291dc6fcf9bf2de4. 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/NLQ8D1900256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466c9875a6580d070dc673166c7990039c6723b4b57690fdaf02769886a26bd7. 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/NLQ8D1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517382c438baf17fb80b14847e798daa50c5970fad1db71821666e17acdb19f1. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEWM91900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9963d3d3b526006981fe6bc238ed0a391e8027259aae1e39efc7ef594485f2b. 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/GBSMU5796651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1431ba0344cf923dac45de8bcc6419a0fe5b3e2afcfe61ce5075441ac6fad98d. 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/NLQ8D1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bb2320dab8ccbc54227123c5fb4f58294d084ece5c41af3ad33e4296fb8e7a. 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/NLQ8D1700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dddb63f322523104e3f221e07282d2a87f84b4421cb76d2ac025da6b70239b8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLQ8D2101972.
In My Arms - Jack & James, Distrion Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce17dfcef00b721f3999a944e731a1c753ff726b250206fa7ddaea348dcc716. 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/NLQ8D2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6fe9be7694844645f9ad8b42e7af8f7712043fdc4e333dc744e669b7bd954f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLQ8D2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1881a03a650295dbb8e9a5279b7f1a7f70e7d3ff36c31a06347e1535c3a9b9d0. 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/NLQ8D2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3295574129b42ac271f88164fc0bb2f37642c45981771010e1f83392d7814ff8. 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/NLQ8D2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33786155a299326ce56ae34db46123aac8898dae4821deaabe25b711f1c5a6a4. 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/NLQ8D2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b482f948545f880c6b0e9ff46bf26821b16bea3cc4dce7202344c23cf106e09. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKQU2193202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf078f626a37c4279427b32a672236b417f0b683392eaa626763038c22ee31d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBKQU2193211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9baf3dd11013f8a9d6fbc4a11f586446b4417fb9f8025e747caffddfd035243. 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/GBKQU2193214.