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 0xf8a613e58a0549869db200c754fa4fffcd44bd1bd643e505416ab2e9fedb9089. 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/93b2b7c3-84eb-4c7a-af82-a92f7003b8a5.json and https://artists.proofprofile.net/proofs/artist/93b2b7c3-84eb-4c7a-af82-a92f7003b8a5.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 0x65112b8e35e47e8b4bb00c82a48bdf6371abad432d87e36e1e020b42d826b219. 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/USEAX1703575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e73e145c428d9522eb4bfac7e6aad0df23046aa6565c167230ee59545fea925. 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/USEAX1703576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29870434fee707febc81443f7990981479571a1f6877b840121e76a8ededc032. 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/NL1LE2303437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0091b1539aba3e074d14cf6bb1dd15c1cb6fdd148b6c118e88047941be1fd4df. 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/NL1LE2202651.
Do U Remember the Time (Evil Needle Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b5ea757fe67bf0e5fca882e4789d43f413164858f6ffd6e45694ca9bb8794. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCACF1538918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8bc80acfd44ee59f76133247c2db89aee611b5ee8344220988b5f9ea9d9cf3. 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/QM24S1822479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0e6ed73d651307e9e1c607c44c4721ef3bd85c3e15d413cc3ea87b5d0f567a. 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/QM24S2002242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24886bbf80fe3d7a6c26c2f9a3496b34f1f8ee6cd35357719c37a5f248c845c. 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/QM24S2002243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2ef5cefd5b12757b6203a2acee862851477c48383158b2709276495ff647bb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM24S2002244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848fc164643ad58b084d4546586868f056e61514c7e572ab36d44200ed5dbe0d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM24S2002245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0ccd5d4aa8088828caeb2a06c781d7caa061247fdc6ddb9d10eb6bee66fbca. 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/QM24S2002246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9121c2e4f9ba96338028081552c2bc9ca4f272e60010f98c646d5102b3fb8c4. 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/QM24S2002247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3aeca5ea57168610675b57599f7c71e5e99b5c1888c2ee22a1bb974d97a9b5. 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/QM24S2002248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb9976d96736585a876683680eeb000eb904014ce1999403c81b0d63f5fc31. 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/NL1LE2302972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd470e0ec20424dc1c1206c036e82f479e23ea9e5892e71fa94ae2db084d4e. 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/NL1LE2302886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64e379187d500546dc021189673e17fa722d142a948a529e2aa21f9aeb9ffca. 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/NL1LE2102550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f7018e3d0cb91f5a084bd41bf218c53f5768d4afd3a64745ead50f5bdf34f. 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/NL1LE2102520.