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 0x91f9eb99edbc68ed5b2ac0ec1741c7e2de84d41dfcb3c767547971acc3838086. 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/3a711392-e919-4198-8e06-d1717651e013.json and https://artists.proofprofile.net/proofs/artist/3a711392-e919-4198-8e06-d1717651e013.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 0xbebbbc47d705ed5ed539f7375797883b3b02d5aa70029b770ccb0a59d4e644be. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/INUM71400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d2e1e94a71e93097ecfaf190c247f83099de4e63fafca0f3214b38fb8d779. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/INUM71400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44b1974c3276a7df69fe4d719735a70010803c20b242a78b6f2038a349ddfa7. 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/INUM71400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c5cbb9b876d0c812570f6d55f2e9e7af6b0666ad647470b016d2f5900c5398. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/INUM71400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e30ddb0dddca8c36c95639a22f1695d3c3ba3b8de181326dec0b4f98fcb8ae. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/INUM71400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea14e0cd5ae6a1e656e622fdf41111d2b082477bc0ee48db6cc128af6431c3a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:44Z), 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/INUM71400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67b19f755ccff20112157c1056af39341cb5c0a4d2f004966e75f63ee0ca67f. 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/INUM71400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44767c016fe5457b15992f4ad291795a924e7b99da956915fe1cdfde0b57225. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBR122200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a921678301239c2ed835242b18631e6fbf5c76ba882a9680285ad05e09d595. 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/INK491900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb75f83bdde2e7ebed006c46620f828f1f9540baa8bbfbec076c046ea8caedc9. 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/INK492200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5537c701c93a02c5f95ee0757936b0de1986535ad2abb1d67d35f51d9c776840. 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/INK492300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61088f69f14395f9b7c9a7e8980cacd83569c11bdf8b5742d62c6ad34f71d13. 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/INK492300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1ef86b51751455163f0da02a8572d1e0a7338c1f505d65071fac0f28b8e778. 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/INK492300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6be84a3a8851207fdc64685c64998cf807a5c10fc971697edb06d6944df965. 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/INK492400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ee48ffd8890452c0dda3c7b2d515b08825e15ea85a985aeefea59110340f5d. 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/INK492400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c1771bbec9b6ec7014c2171dec7103ea01925b4684e65a5e9cdf275d2f2efc. 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/INK492400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779a8599303d9aa289e4bc105d7884728d7b6012d0c8c47c30a51ee3f8185e5. 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/INK492400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b980f46ce4849e96023d8f809434d97a70670aa626b05097560e7d4c83526f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/INK492500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d53d5a2386cb8ef03633c567a60a9f1a3106de6bb6bd50bcfe480b44fba7f9b. 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/QMFME2372918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d53d5a2386cb8ef03633c567a60a9f1a3106de6bb6bd50bcfe480b44fba7f9b. 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/QMFME2372918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50de68a3b58da8a58b8e73649d2cd7016e1b80da827fcd9cb97f390ec89fb6ab. 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/INS182301661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1698384e3bdfb528e98ea3c829cdf85dafb8f17fd39e19f603efdd8892c74252. 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/INA4Z2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b8929a4b7e0b1211eca5eca6e3ac7517968694519272782ec17f03f9fd94c. 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/AEA182400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566bffcf0034825deb3c2958dfba182680e229f5d44aeb0a44f97cb191dbcb25. 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/INUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ad65853234b2efd119f0a7a67c3dd37a3fa5841f2f84adf7e50b1a745e091. 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/INK491900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590695a25d38e90b1c9f7b37c33f415c885f21bda08fc1f38c3354cd50ab2f54. 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/INK492000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ba6737fc56f442ed2b6e6bbde3c9b92aa65ee9e118c9d6bf0264d2f3d212c. 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/TCJPD2589449.