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 0xbc7c3fc6c01e625d0832b3be9708f56126f88cf9ab79b0e246542d252f0725b3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa8c367-9031-4464-a342-b7637eb5e0a0.json and https://artists.proofprofile.net/proofs/artist/efa8c367-9031-4464-a342-b7637eb5e0a0.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 0xa817e072272de5f59905bb761246f408adc3255f0dabde8b13eac8d15ac06d59. 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/US83Z2350332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ab393999be22a9413102e52918fdf690cac0378244dbf69cf54390e9a7c00. 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/US83Z2350335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4665b9a6de9ff468d5312bf1638d6cd1d844e990a2d9cefb1aa55da9d083e8. 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/QZF8N2065455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063f8a349462bf4d4453567f67e1c8ea048b6c3468f5b8597a86fe3c36e68d85. 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/US83Z1932389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6832e5652b8569518471eb5cfcdf8dc06b0003ceae8c2046b21416a9c37dec0a. 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/US83Z1914416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5ca8dca91bd4637c89a5cb36570fb36af8eef0431f516b4edbd46a328fe4d0. 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/US83Z2006843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722816c4d42618d5b387d540de6427b01c99cad53330352d7222d74cc7a89a8d. 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/US83Z2006845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c29116f6b4d1dd75f9ce742e0553e277b7936db240e57b8477f35946957a2f. 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/US83Z2006846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4ce7f9ad1453bc30cb547994b60543590d66231fc471d31127e3f92f24beb. 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/US83Z2013102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e79114c24758465dcef31dae7955b6c5feae29864f82794bd32f5499bf9119. 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/US83Z2013105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f996770fae443f3a36925a192b2379695ad3c11fbcf5d6fa203e10cf73b4206. 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/US83Z2013108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789b0034b6fbe31e92473441c4fef63578ab3b2bc9f492e60ff40ff73afed2a. 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/US83Z2013114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a246efae953be9f82d398cda8e2f7200ef4181d86c325a026b214c9de7fbaac. 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/US83Z1825651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01b2af253e2549f47ef33f4c3803aafe9d04c6d8e1a9251fe94cea55f9a4573. 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/US83Z1825655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b692d6a90c75d942cd268da6e6d8af114e6ab1b1035041d68499dac079d1ed. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:15:53Z), 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/US83Z1923880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc752c4f24c4160674c1e7a2858ebcfcec78632a15e02c1f861c063952b18f034. 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/US83Z1923882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52cf6d08acf9af9e9023a6bc11716e5d91b997678af97db508d364e0f5ce4e3. 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/US83Z1923884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e95d402d8b44977ec3e39d9aba180de25410b8bcae25363bae579a927841a1. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/US83Z1923885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20489c432a979fc205574d1b262cca8b3c650632d68281989073ab6688eb4087. 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/DEU671601266.