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 0xb057f4086b6aee11225f0a05aaf7817527cf23db7a897e014e0e54715b4a166f. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92d3d2bf-d184-47e8-978a-2a8c19c61549.json and https://artists.proofprofile.net/proofs/artist/92d3d2bf-d184-47e8-978a-2a8c19c61549.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 0xdae76831b12479a1fafd464664713b3e2dafcffdb5a31a7ce83834ab26fab921. 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/ES88G2200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499606f786b337bc00a10048134d6d359cdfffc0e38fdd5ac7a9675f0e9e4aa2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/UKXN22260373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a9306ce27b5e3439501fa418b891b8e2b39c6bd68313ef612dca1302ef98f. 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/ES88G1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0872e9d32f355b127ace14b0b23bb511e49d87db0f53fcac01cc7541ab9af51f. 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/ES88G2200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e73f2b4d4302a940c7797dfe176c27940647e76b28a3c80a66541f3efbe7b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKXN22278146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07237038f4b095df7e601c0ef3a93991fb06c49f70ec8605291af8f0d59d7c5a. 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/ES88G1800144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8ec2068c8b8c0673ec482320c1be5d8551c666a3bf66f1a8ef90065ab4932. 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/ES88G2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190994d82f366d30c96d5c844ff5521a5588d6068fef1442b3f1787e0001f4c4. 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/ES88G2200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e5601bbe377fb9655d3eec51924385aee25568fcbef435a11b02b10cede2fb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ESA081700293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e37301e9ef0b26ff5f5a9b979d096bed8f51ba47d564123894be746cfdd0bd. 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/GX3Q92461935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd258368da46c51d2fc67e86b534efe12a2546d7d651a3eef3da8afb9c9f57860. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLFP2458573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fba3c40fa3b040da1ba06a54f3e43be9abeda26e0b8dbea73235afa80879ce. 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/UKXN22336199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aabfe234d02b7fbd678f8c77c643827c3bf573cf18c0cba06c27507ff31065. 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/GBLFP2312721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e73f2b4d4302a940c7797dfe176c27940647e76b28a3c80a66541f3efbe7b. 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/UKXN22278146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499606f786b337bc00a10048134d6d359cdfffc0e38fdd5ac7a9675f0e9e4aa2. 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/UKXN22260373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae76831b12479a1fafd464664713b3e2dafcffdb5a31a7ce83834ab26fab921. 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/ES88G2200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0872e9d32f355b127ace14b0b23bb511e49d87db0f53fcac01cc7541ab9af51f. 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/ES88G2200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07237038f4b095df7e601c0ef3a93991fb06c49f70ec8605291af8f0d59d7c5a. 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/ES88G1800144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a9306ce27b5e3439501fa418b891b8e2b39c6bd68313ef612dca1302ef98f. 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/ES88G1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4f2003fdf19dc45a68d3535219095d0d1774ff40901f5a69b0a8d9006e156a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFYX2130658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c780a4fb0745bcd3ef196ddeee06fb4d3c0272bf23281c97df0460f06636ee0. 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/QZK6N1918687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e78703138ace93f7f826ed1c3c269cae341492614db17d27bdd97d91edd54a9. 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/QZK6N1918691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efb922f5a146485c24abd873979138d66ae50af2676c4d029caa670a0c9b0a8. 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/QMPKX1846480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39adc817dbbe24d30b42281fd7722d36aa094424cfe6941feb58639d410fb0c1. 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/ES71G2338393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb343c00a1aac12da710707e627564ad91fdb8cb0db109717532a1f11534afe07. 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/QZNWZ2583033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb20605de17347926f444dad77ab8987c6f72c389de734f77115221e20578fad. 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/QMFME2406151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8b32b8c62578598e5ebfb1c7a9cf5be69ff4c341a47214728271a94835ef70. 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/ES88G2400215.