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 0x4a976f664f3787866068b56fb77f562d2ed93aa0b932c685eab2417620a6caf0. 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/6372c064-6d2f-43a2-a5d3-268d613eb358.json and https://artists.proofprofile.net/proofs/artist/6372c064-6d2f-43a2-a5d3-268d613eb358.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 0x7f711e2745bf1653ecc51d8e2cab626a31886f17ce46f1a76678b2a05f88b2b3. 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/UKYRJ2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d14bb3af77bf0a9fe3739ea44d63ded3741ba1b183adc044c0cb25575360d1. 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/QZHN32351851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadebedff5363e23e4bd1e8be8d976c7de57da668937efd2680de2a049dbbc9d. 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/UKYRJ2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec9836c660c598f180a71065cba3d3096e16273abd09a1c6ae521a36ff7645. 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/UKYRJ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec150f680e0f3706f91cec6cac37bd314e6a2e1d49dac865ead44b17ed5d6845. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/UKYRJ2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efee19e0d3ed861690d2f553b793a6e36c33bf1942026a028b974fe2882e42b. 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/UKYRJ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d616a51338e7e1fda78c792456a6f5444f72444b4bd4162fddf1ddaab8e946. 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/UKYRJ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d616a51338e7e1fda78c792456a6f5444f72444b4bd4162fddf1ddaab8e946. 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/UKYRJ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a05384d70e4bfb2eca4c91ecf668282f13f0eab65cfc75b7b2b27d10886b00. 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/US25X2302078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3049110f6fdb42bceae2a6733f8ed2da03843dc8974dd924fd3f574f0534bcda. 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/QZNWT2361601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9960ca1ac670178c78be5b146710ab9d53888fd658654866ab77ba4e5f86246. 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/QZNWY2311931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e8e21fda76c8d98ca53d47649599961759adf6f1e2a7ad19268ab74597a8c. 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/QZRP52366998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc730af16dccdf8fbb298d6fa90c2894f57db3aa9530b29b3b229ff4087c195ab. 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/QZTAX2318024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e07da824982683b3ca4ca87cb323a77ab7d48186d22de0d39cec6c394127de. 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/QZTB22337043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec954030a2832c738b29aa4d4e64c4cd48e827fe86c2805dfc11caa0a5f8e8. 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/QZTBB2302330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37728d15493da323e528908f381863af2e66755d1501e445d488c93a6c839b6. 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/QZTBB2302331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e9a92f1083da8b55e16c4c08d4204437aec2ef97ff15aa4a149f1a6bc950e8. 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/UKYRJ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705f223f34bb68febb9f8f0e82fbc08d8f3d4bc2deb387bea5f014a45a55dd15. 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/QZK6N2348183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6fb201ea7323bb6eb021e5d2a36a19b082c0a135da79107911899e3609cd66. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR2X42396962.