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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97154437a522766972323333ae25482ebe85dd01eb131dbc0941f7ad952bc7d1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b828782e-ebe4-484f-ae96-eca38e3c1cd9.json and https://artists.proofprofile.net/proofs/artist/b828782e-ebe4-484f-ae96-eca38e3c1cd9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5b1aa728b338708f50bc0e41a63259da29596da40a6eaf990dc574568834ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GRPA11500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa386572bba5198bc24dcf9da0659322dafa0c54497f61a6152b07aa8d9c17740. 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/GRUM72001242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df0557c098de9a7200e3e6cfbe2b243a104917b0402a2150d8066470357c62. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GRUM72200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b8ab5f51441c0441f2a544c46ad1e4ae1cdbe778b83f7ed5307203e9f0d90e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GRUM72200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ceba53a60c425c00ecc8211f913beafb665965044466596f8884ddfb333a43. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GRUM72200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2870e0afddb5890c906eb1fcb0f428924f605d13f4a8fbb8f8c8e184b0168f76. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GRUM72200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5060290c73a3b53e33893c3e1ad08a6d88a39491e6427d03cb174924920f5c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GRUM72200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9943f9db059adbf8136884e5d88fd87be3909d02480b3aeb21b75cfbf2a41222. 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/GRUM72400738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0fd82802f202f5d7bc938df07f98a5aa8a1578ff25bbd892f0d47c9656b43c. 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/GRUM72500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb50f25545e1afe2dd5edfa73f8279d88458feaec99e3d291a3b69840c5b5ff. 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/GRUM72500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b74f8b0c5b1263c0993d10537cb31885ce863e58b7bddff7361bd4626deb552. 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/GRUM72500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13b851eb63129ef0c0129ee72b588bca29f11c34674e896459e8ddf8c0755d. 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/GRUM72500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc2033d5eb94cc7b090fa95276d16e76799b111f0643b2d40df76efe738c51. 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/GRUM72500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eebd3a3cd6ad76f55ac4de04a25f937ed62cf2255adba98fca2b41c1ac0cf8d. 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/GRUM72500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe434896adc0344c4f3373b183c3b3a97b791861663907edf41c1607b0169896. 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/GRUM72500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbaf9d11824cef48541661bd7674982920f70e577bea9da60c5a08bdf2995d2. 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/GRUM72500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9538a345022ae451c3ae87729f897bd316d865f220c3c4ecb597b86e272c1d1d. 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/GRUM72401023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1440e466cb8c463f5c2d088f5fe992eeb56d14649f211faff94c4c52f50951. 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/USZXT2456176.