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 0xb93db54ef787b8a557e2ceeef05f2dfa7f7b72960def5c36efbc7a25a1facbb9. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/195577a2-5cd4-4d5f-ab07-505314a340da.json and https://artists.proofprofile.net/proofs/artist/195577a2-5cd4-4d5f-ab07-505314a340da.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 0xa73ecd64bbe27eeecd805bdcf964b496594cfba003f7af98b7fc7e2f7af0d515. 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/DECE72400905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8263aee2ad56ce5c325b92c292bb9f1881810981222e4b97fae4ee7355f54531. 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/USZXT2454620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ee04fb9ef43d2f1e282c70fd9055ebfb706fc7357a96f979d817e73e0f961. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USZXT2454585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867359e55f4abb0cabfd636d08a46018861d89b57927df18f84688dd9bc0338a. 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/DEUM72404783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1409d2a0039952f877d657745f91835a29f515ec61a0ca991dd57488340ce9bd. 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/DEUM72403615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126bfe0f2f9b08c25fe419de8f8cfd69bce9e623ce91dcf13615e5002bd0e36d. 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/GBUM72402016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec3b439cf03e97470af54ede42f80cee1d4aae286d9c6c83f3b99f20b1e4853. 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/DEUM72407467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9811bc0987fc25d471d6600a1b928d495637118f9f84501c0dff484475c7b826. 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/DEUM72406749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0720ee819d6fb3a6b55c1ba1664e629e79ea5719bcc1cdf10449a292beaf2d34. 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/DEUM71807102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19385655fcbe6cc57c089f930351caf9fad0ada429f331ba291c4cd974e5050. 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/DEUM72402726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbbb52b1bbb77690684f7ee4e304c495d75179fa966fc6791ce61ec809ebc7b. 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/DEUM72402971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7187f78c800ca9d061635064b4c4089d9fd60d9278a500db98cb9890f16c0d. 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/USZXT2454297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe399d1d9a9b1876fe1c8cff3e16684733828391232e062f436c94c075afb9f2c. 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/DE1FB2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b41e9838516dafb5deecf91e9bc481727cb37f991ba6e2a4e6f15ff450d239. 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/DECE72401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3e2096fec9cff1aa481daa5d7550bfe842eab85ca815091879f0d33ffd1095. 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/FRUM71201906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e576c61855d3fa299d544c6feac13c008c3ec5ae671574a3c3f6a10dbef1592. 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/DECE72400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9355b718be978a65f9294a45ba3eeee3870100cde199e9365914fd826620eb. 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/DECE72400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2628c20e57afd0421e2757fd635f989d658dbec9124cb2327fdd6d72fddbd99a. 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/USZXT2455360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac94aba3b37aea732f657e18c2589498bacf496cdc335fa2388ca88977513b6b. 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/DECE72401195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea2b75d63c1d4f4d1fd4f1a3d553417929beea778af5b75c1c5d74a63f3a54. 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/DECE72400976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ed1163ad18197defc64c06d6928428b1469331567d9a378c3648967f29045. 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/DECE72400627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b57e53c59d9729450d13b1ef04ca6e65e323439c6bd3f9bf28dcdb692cd61. 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/DECE72400324.