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 0x85b7be37ac4ee0ef55a2179e20975c3dce0883f8fd5b3d7bf308ad35dc3f9a1d. 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/635bffd0-be01-44d4-a39f-0609c8ca8a96.json and https://artists.proofprofile.net/proofs/artist/635bffd0-be01-44d4-a39f-0609c8ca8a96.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 0x9b7869ddc5290b0cecfa46b89f587f865142a78df82a362f0ef46fe1ea3e0898. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USAR10900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe11b58fc2677d1c47f8b48e921c57cd3ce51d3350d283fc135db035c7a6ce1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USAR10000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cce4160ed55215fcd2cd0a3ce6f35e9dd01e910281f85cc456ca0a6997cb19. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USAR10000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce1efbd2c52f13ee90f0f07f2fc18196d93dafbf90fc2f4a49032f7f2670772. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHU21020062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7917858bcaa7046c8af0ab5cd539ee215f8da153ab3219b402bc1ce3b5bc2033. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHU21020063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f6d8f2cca08bf2a644c840f7aab96f93be6ae7eedff5671a50eb6e2832005. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHU21020064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86cfb3cb8cc9f19ad45e399e13eea751dad8a94d3a855ea1caf2af31edaefec. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USHU21020059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f8f1168b6151af74fb558e03b7d47e2a864adfaa1fe3f72a67fab18455d07. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:11:20Z), 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/USHU21020061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7917858bcaa7046c8af0ab5cd539ee215f8da153ab3219b402bc1ce3b5bc2033. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHU21020063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f6d8f2cca08bf2a644c840f7aab96f93be6ae7eedff5671a50eb6e2832005. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHU21020064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda15dc4f44b20bc4b535d856f45419226df32727ca8be9e4907205630b961684. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:07Z), 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/USHU21100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e66535508c69601e29d6e41a0e6f1d47fad518778fe9fcef9ef4efeff5dbe. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USHU21100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c2c3bc53cf5a3d0df91f6863ff96e57e87a018e4a38b98d1e2adaf2a9a3c3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHU21500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49075f4daec7a046398ab4906456636f4b481b820ca03f91347506371974844e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US7SF1752303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c21f9424a68b97710dda03c3784d4742cb8106b9f3f12593f6efd9b216daf1. 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/US7SF1752308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b9b90b2e1c576b199a5e2e7ba7a4a7434e2d9d2a0a21589345aeaf2702a688. 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/US7SF1856602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe4e8d869d4890ffc132509531d6a4f482f900946589b5f08448c019b598955. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:57Z), 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/US7SF1856604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d153d0228cc9c01f2f18d9f3300423fa5d8400532e1dd6f127f4f68212ab0e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:27Z), 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/US7SF1856605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342855e19a60a10b1827eab459fd09bce4fdf6b6cbed802baf26f48f80fe1d4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US7SF2157077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3273db96fb443fc8f9c9ddcd7abae08e48d07985c74ed2a113521fddb52ff5b4. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/US7SF2157082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056de90fb3c8484ac7abf87edfd86e3f49a9fd28cb6200836ecc22881b2a0ac8. 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/US7SF2157083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7cfdc9cdae8acecc25e5d0007d1e4ed00a451d0131ff876782f4cca40adc0c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7SF2157085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7542ef0b964e104ad691a3b29ac89b3892e0c44fa593712191ac6ea90850263. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US7SF2357389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedf4958d53ed1f88c0e6343b1dda2beb44a84f997be7b2a5ea9943c6f7d5eb0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7SF2357391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bb7c88f9e4a6bfcfe014dff06f2f71a13b24a2abce2a6d74263debe86a7ed. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:23:42Z), 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/US7SF2357392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ec744804f7c27111258eef3c13101d7746eaf1210c745c7c7343967a280063. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/US7SF2357395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda44236b00c7231244684732c8241637c34d45f8db5c6249e936e9e914d21e15. 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/USHU21020056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e15e7d3993317266c2d0bc9cfd2549e308953eb491b99313c404ce775d70fd. 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/USC4R1906506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e0250155abe1e5003a5d86c21c67b761da9a1cd033a2e83c74db60e6fd0b0. 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/USC4R1906507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d27a40f8186bf73e65fea32b387b950969009a8e517c323f5210352a6e1a36. 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/USC4R1906508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fa94043ef498dbfb738a18576e8250df426014a201c321508cf314dbbda8f0. 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/USC4R1906509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96cdb1ba044f7b680dbf431ebda2505d2379e402007219bb103e2ad7cd3f9b7. 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/USC4R1906510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc51b7ab6ee2e9a11b9311e9fe395003b7f37c951a23fb57bce3c476c4295c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USC4R1906511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470711a5a678efae64cc5e9b8974e0cbdea246984805755f9f45d73eeb97a9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USC4R1906512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2163edbba775584cc7819d31af7d9d5745195483ce79e7c9416422318a2d737a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USC4R1906513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a75c2a8aa2d30ca5cd3b6e28a6b7a2d833dc7a30f368ac233e22b8217164ff3. 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/USC4R1906515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e15e7d3993317266c2d0bc9cfd2549e308953eb491b99313c404ce775d70fd. 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/USC4R1906506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87b5119636758267a884de324aa445a19a2fcd494c0d9c06914977236dd736d. 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/USC4R1906514.
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