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 0xd62eaf527b149a0c5e22ceafc105e6a22da2c1e580300de11666303d93483aeb. 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/30fdc75f-8042-43b4-8f68-e49366c1cf82.json and https://artists.proofprofile.net/proofs/artist/30fdc75f-8042-43b4-8f68-e49366c1cf82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John of the Cross (The Original Musical Soundtrack)
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 0x1578def2b939099503696db3864aefea97268808c5cbc12ce08304757fd9d3da. 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/USA4N1301710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edf77d0ad43fe2129675e33bd1662188d0ac5745d4711e5c84d596ed3a6d092. 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/USA4N1301534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d80815d73c5465cd00f4d05109c2205b3aad45da28dbcc0c1ca46c9ccbf5a. 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/USA4N1301545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869a9ab44e4ea40cef503e6f493a9e3d67050d1ef5b7fdd45acd85ca198e4e3a. 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/USA4N1301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a9c9dfcf579f639ed06da44a38a5b13f41c2164ea6ec6b69b0893311424fc9. 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/USA4N1301753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e269dd0d97c2bdd9d452248dbf4a2913df01733b93664afd4d5e0b0d0124e47. 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/USA4N1301709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9e20ad5bc8d8ed1d0e4a05b57d23844e4b9366f53d3b79511ab5dc3d74c2f6. 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/USA4N1301414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8335e7045a19f6482c95fb9ceb7d2c0d554293a20b8233242bccae702955dd. 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/USA4N1301827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d03d4ad6f3a7d7f52433ff8fa6ccc43707a177678310676c6ac2a6b63c1add. 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/USA4N1301610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e072a72d281d78d1f7a79bee3e07a2cf4b7cc8cdf0abef1a39db17322a0bda. 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/USA4N1301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27716ce4ed977744698a6af5dcba2a2b089d9cedb4d3f3372bee4abe5b8387c. 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/USA4N1301267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f70224196bf78d4f2b391c24317de865eabc660bd97d28701be2fb46946bda. 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/USA4N1301543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b9d8d69e8a845f8f25091b0c0c8bff7e6a66e8d9834b105863d7ab4def424d. 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/USA4N1301661.
Canta Lengua Jubilosa/Pange Lingua Gloriosi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bc21c441d8b4e0fb480d71876489045e2fac0bd46eba49c97b1f5d4f3517d0. 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/USA4N1200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054993052904354b61b0ab36929466593861d0e8782f74f81dcbc3d3d632bf3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA4N1301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4ffa33fa57f28773e89b5d9226956c5fa40d124d7a809e4b94606d03ee2a84. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USA4N1301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b731b72465a9d5bbd77bfa3bfb66cf41bab423273c81e1aa8ba128a36720bd8. 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/USA4N1301857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2467f9a6bc2d5e0909b2048b903372a00523158c95dd5ebe718df2b74e64d6e4. 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/USA4N1301500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd071db15f14b1e808eb27dc0c2f6a966c645d2bd0ba8cd0f0e532fab841d9a85. 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/USA4N1301268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7c2035de7292092404a662956f2b7fce69c0f12583831df46f7f5024235720. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USA4N1301273.