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 0xc36edf737d1aee6f951c4e4ba7448b69e0d80e24df910c10149c21730d8cd64d. 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/d2706e63-c9ab-4b08-a3a4-ae65d59f02d9.json and https://artists.proofprofile.net/proofs/artist/d2706e63-c9ab-4b08-a3a4-ae65d59f02d9.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 0x6c71b15058eabfbef17b809c9a99d4faad817647a31ca296d5b5bc166adcea88. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZNWW2063502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6913f175aca8079ab02850cc86d8e37c776a6d4ddb32cd15c988e606f128573. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZNWW2063503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255c4f4a158265ba267cbe503d202b5791f80898ea0cd30864eea2b7fec17470. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:35Z), 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/QZNWW2063504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250539a5994bbbefc2a50ea5015a9755e13d4c301558fa59b991a6b3117e1c0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWW2063507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bac51c41e7632ded212e9b95a310146508d3d85a654311e2f78a9ec0b21bb5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWW2063508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27bcc98062e05c561903cb48c435f2d0358511de25ded4129a3a96538478b07. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWW2063509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f9b732ccf8afd9a57207338eca89595b41b13676cd9bd0da4a5b6d29dc7859. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZNWW2063510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea32cbca0e8fe292234baa255f44e81c2056d4431b498d5848e480bbef80bc0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2063511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b721cab6c555a6a0a9dba4a9b4cb4a036de6a60df3cbc4d6ce89e766d124c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:05Z), 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/QZNWW2063513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b05b1f24d7292446d295a40f972952eb27a87a53892ea6a9ea172ac6fee6a1d. 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/QZNWW2063519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0560103b397efe1d3882a744220108f1d9f2e1e1f18ee30f3ca69deceb051462. 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/QZNWW2063523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddb92dc30f1e551d40314bc1d3b733225c5adaa7e7bd3c682e3b50ce893295d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWW2063526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a67689ff1c2aa7e404b545286ca86a58a0a3348dcac6c0fc5d319021658292c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWW2063529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b977a04a1c72dbfe0ddafdb0b0f0570355c12f90910ce07dd224e91942c0f. 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/QZNWW2063531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ab1d3df3a29567e7f1b540913679f415bd0faa7c5cfe7afff010ffe04713b0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:32Z), 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/QZNWW2063532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7558c2e688e80941b741e4c5d90c82c667a4b211544b8c0c03e5637da74542f7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNWV2030142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9553a5545840fce41ef59fd550fcd55d8f655214a8bb7440278c2c74930c63. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWY2058240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3904ab1e6c9e90dc0b0295a24dff4d4b182835963d14c127108e802972f32d. 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/QZNWY2058241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddda8eab6e3e29fc706e63845702103d95cab4a462ca41e4723ee2458400c6c. 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/QZNWY2058250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fecf4a4b7010ab47936888dfb81dab15935694cfa085ad01722d8991b4c61a3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:59Z), 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/QZNWY2058253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca65dddbf96cbac35935074d13dc88bd7acd0bc6ba00012ae9caa13c50ae8fc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:20:08Z), 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/QZK6G2187199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3761d10d31c6296a40fbc038d9417ea38865aa918d3409257784ae0a2dcf84. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6K2253192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48590b8819b9eb074fb1865956cbff1991064daf0fddda927d444d2534e07163. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTB32253911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd265d3a6c6bf51cf387031aed6d342bc551954bfded7b1f8c2135daa7ae16f4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN52154651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7190354099e6a5b0524806f49f1dba07cc2b7298ac4f7cf90bb43db58be09dc6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52154655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f63b7ab8417d0dd3cf96eee9a3b4b2800d74a3db6f19158bb1d576d85b61242. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:24:41Z), 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/QZHN52154658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3d3b9be9d8be12d32f424c5094d08e379da125891981ec886e31ce707e7344. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72367334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afbe034a6e62c6e14faf8b363ef7046cba3a0ecc064bdcbbcd172f279215aaa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWW2338118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b64d9eab898ea918403b3c5641e1bc34fb9263b64bf377d472f3bd07de6ee7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBF2331717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78fbf2f5404860d58f3b1ff24a2509c42fa32aa692c2b27d0be3721af4ac178. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES52447181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8673d6ebcee5d222e81ec93f0f71b14f2c7026238083013d553820751728560b. 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/QZHN32423382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6888673bd6127b1a0804e0db597b8ecbcda8123323a30f56a165001df93d708. 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/QZTB52572580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7a806815cdc80c424b68d15ace2e02743e6d96cbaf0d536a2f08ef7c4b5b8c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:49:57Z), 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/QZTB62561776.