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 0x2f24f4df8e44a691499dc2c78e04a49a8c757536b04933bd259e4c14a756b1d7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85a61db6-dc7e-42e2-80e1-0a303aa2e009.json and https://artists.proofprofile.net/proofs/artist/85a61db6-dc7e-42e2-80e1-0a303aa2e009.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 0x1659f9f1c13bb10bb2c385d8792061a674cb5de4098c75c02b542bbaf4693484. 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/ES64E2484653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600295193d9b8841e21f78369aca73b571625170f69b505cbc1b552ed05c972a. 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/QZMZ92427807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901bbff00c387785fdcc481935f7dfed60205a00adfe33a8b5c535e702736b39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQAY2413068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6577e2a1e197abbef01148c9a468853ab7bddcc2e96e6092a1ee90a2f8f981. 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/ES64E2464192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ef9f134faa1487bbe00e96f4b84de8acee1f12384c21b40b20ccbc38e985ed. 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/ES64E2461390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24825ce9584fb0dc912ad5fb47d981f66fc2659d8ff0e3afe7882dbc2135020c. 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/ES64E2454733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d799d311920ec0c89f0423eaef04e740f287f98a50b8f1fd022cc703296b784. 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/ES64E2326314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cea257b1d2ca16288b66f3c55962657e7684974217fff01a6611fcdcb493d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2318735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd767524256e1563486247a7ad70f62b35ce549e580560fa5b8bcb100d8a876e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES64E2307119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27a5109104bd48d509c3194937bb446f2798dcd4470d895a75fc7e394edb65. 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/ES64E2415019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec52c0b114b6ccd3bd557bd7d7064d322d1c6a4da80e85ac84114fd6a033b70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2418346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97569bdcb434fc2cc23742c9aeebc69974b48c7056842efe2b09fc9bd3455025. 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/ES64E2415014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67641b5602bc059779a3f388075f75f3b8f012e907279c784b7efd947948e2ad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2410942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20c07535383fb094f97f5a9769ee5322d33af22e6944c4a7c28ad8576ca4cf. 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/ES64E2409252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a4efebaebfbea0bde7e2f076f58ded039c9417323249ae366df34265e7399. 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/ES64E2499417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057052ed8437699f84e7a5d50edfe02f72b458d62eca827dc2011e94ba95f8e5. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES64E2499415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed1aef40ff5c7454cec990726f1fe7e2edd5882cf3d20782aba5062b1d9caaf. 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/ES64E2475439.