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 0xda73b8266a63967bb648a752e16c6e3099a19d59f613325f22bef7a050b7d4a2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0474ae09-e617-4fcf-aced-4ee4382f0c7c.json and https://artists.proofprofile.net/proofs/artist/0474ae09-e617-4fcf-aced-4ee4382f0c7c.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 0x77ae2c35a62d9fd95c7e38ddd0f5d41d1089fe97c1a55d1f29b42abf2176db29. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBWUL2390494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc934d88dbd11cad3c4d0488aec590041fc5fc2d80532b0b558850ace8dbd38c. 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/GBWUL2390510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05e64e044c6f63166ecefb3836cd92516754c1afac82f318d31602ab6f7734. 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/GBWUL2390534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47dc10640dea680b639c4130f5f6b23ba09315574310250f93a58e076796120. 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/GBWUL2390484.
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 0x496171770378c322591fd8c5c393f15306c14bcb9874071f52e91bcb44c62a11. 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/GBWUL2390486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe10bd6c25e6382b54ec8e5f130c14caf6ee62499d892b188954cb4da76fc218. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBWUL2390490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a57c2307dd6f67558395e65571280e4003906622e26d5c819ae1481bd1d9564. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBWUL2390497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e238a7752cff5b4a46bac5a2245950f3e677e795f8e2a67707da9fcdf39fd5. 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/GBWUL2390507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93f152861a1dc2a83c064119cbd82212af15c0d1908b1e6c57f2967c55d0073. 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/GBWUL2390512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92132b96094b27bd79ad2e4d61727c4db1cf68c8364448b09037cf10ddd6401. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBWUL2390518.
Avatar: The Last Airbender - Main Theme - Ambient
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd506694e8ef1776889f176408716e8d81b928ac66e593133af261035278a5ee2. 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/USLZJ2439175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26ad9edc23d23e1e6b989fc8f5aa3eceff213430b823d94e39c8ba9ad1cf660. 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/USLZJ2439176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac71063170c890bab5730346e7ad4a5c00b7b3a529ea1eae4f7a1c90407da41b. 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/USLZJ2439177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73e996719f3bba063d392725a82684c88b4968311fc7762652059f91379ee47. 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/USLZJ2439179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee936835c44f5d0b1392b5bba3860f528e0123fe8d96209800d543f1e80f90fb. 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/USLZJ2439180.
Avatar: The Last Airbender - Main Theme (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff8502946a2289cec6c12c92bbaa7e1d92ca28ad275e8fa4133157bbb7a75c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2439182.
Avatar's Love (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c088f322800867bc934ab6040b269dd195e71c6ac542b5481e37f30f9852d. 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/USLZJ2439187.
Leaves From The Vine (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848e0ec7658fabe82ebd3f5e0aacb9f54ec2fbac4c828de47e204e9da3751093. 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/USLZJ2439188.
Jinora's Light (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed7a08671cb19731c4e4754f61feba8ceec8981c0f830bd0fc0f74ca916143. 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/USLZJ2439191.
Service and Sacrifice (Ambient) - Slowed & Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464b09e72de3ac2b401d3609b15a3c9ac889e88d9e84cd1d7add6b65124f44a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2439195.
Avatar: The Last Airbender - Main Theme (Ambient) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2e86fb893a2f1e71e210fff2d0e6cfca06af7570a1edad0c1084edef43faa. 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/USLZJ2439197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2d6c3407757df4f0355f1cfcd78d3a8da7460ee35b7a53ba83e650ac8de8bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2439200.
Leaves From The Vine (Ambient) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc39c4ddc7005904b55c0022446d90b9f9afe7c8f981c13ee8593ba0a1be68. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2439203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094fd97c526dbc08a6d33868444814bf11bcad72c2de5b0a48c362abe5a5deeb. 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/USLZJ2439205.
Service and Sacrifice (Ambient) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45735431707ee5faf4fb4bcdc47343a814064a80238e7f1de4ea2b67fc13f8cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2439206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab58d6bd31c0ac919c825da49a2ed48ffc3f3cebc9459e5206467f932c05e406. 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/QZTRX2397358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601a1120788d595099e15d551977323867bf55f200effd853d975a3f3a80517. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTRX2397378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b9cbcee1d471d771fdf7ff58c791106f6f22db087a4e8f904594c97de1fd2c. 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/QZTRX2397392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563158781b66bb1f4ce3e11608631794b6332b949a875cd798014a428e757aca. 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/QZTRX2397411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aee724a793d2becd8741ea8d7710a8bc8d3701c2f8b333135ace03b65b3922. 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/QZTRX2397420.