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 0x08a32784520e679a3a781182a5884a8f3f0bc0812dddc56850fab98cb6de6213. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/977dfe51-6df7-477a-8e5f-af5b9678f494.json and https://artists.proofprofile.net/proofs/artist/977dfe51-6df7-477a-8e5f-af5b9678f494.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 0xf68a969f8815da5e2b811ca3e885834e9dca4079406f089db7e7371b1a21197c. 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/QZK6Q2370384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6089fb268ab8174dcc79ff06c4190e84023147c6135fec9c7fd0c461009126b7. 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/QZK6Q2370385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a276cfd7fff6ccde73ef2eb3a71f102b11d2e3a86724c5ea7bdc0b9cbf4de2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWS2388177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbcf410eb98afb0dae3ee3dffd3bb9b5140e849574cbcc2f69dce1ea39baddd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:23Z), 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/USANG2494678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67fbaf0279bccc68ecc3a01969486dc8de83b78ebff620d806ee1cff413fcd. 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/QM3DF2405864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbcf410eb98afb0dae3ee3dffd3bb9b5140e849574cbcc2f69dce1ea39baddd. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USANG2494678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095335c2b2528bb6e32f47d70abaf946dbf9c54dd6925efaf158d704d22dd47. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USANG2500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629574add3575803300916e742bdbbcb45dc2aeacaebf86747ebd3915b37c709. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USANG2500253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622b68ea9f6abc762d070b60b913771fce609083650e45f5b2735f370192b2d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:44Z), 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/USANG2500249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c6dd9aaabd9017cc6197cdd70f6662989c1862509992d6010125fe9eb6406. 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/USANG2500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69ece49ad5bff3533191086132b6d84889150c8ebab043267da4cff19f42c8e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USANG2500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2ac15f9abee60c658f320b78412d0af370cd208341f9973a3b3e1d92dfec9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USANG2500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c5ca4677af4956206a3ce333bd2bfa86838d1cce3cb5d9b3d7a0fc9ed6e525. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USANG2500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167700491d4cf3dd6b28052f1470032378e42c92360d8a59cb95fd49c754b291. 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/USANG2500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ae1b251416919e0c83b25a7d78847167833c3dec515b2c0b4a0d840d057d0. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USANG2500251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac9038708518ee8772e02d618a3243f4476a8defd2cb38c47efe23d64ca75f. 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/QM3DF2402491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93cf6df36771f5f1620c37e5ba4977663b3394ebba6e512e309aa3089323b26. 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/QZ9QQ2500071.