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 0xa2ef13ebeb98d49a1b352080fb58a07e3af2bc1b8b1cb0a5ccbc3afab072271f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c1b5524-3f43-4ea2-81b1-c3e2d5157e2f.json and https://artists.proofprofile.net/proofs/artist/3c1b5524-3f43-4ea2-81b1-c3e2d5157e2f.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 0xdbf2a4ff3ea23dd10063ef9a27dbc85a7a6f1e6e1bee196d5879e6119b1efbc5. 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/ARF412300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d4519ad198969fd40522177f648093425d648e44b433ed029fa77cf228be0f. 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/ARF411900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf2a4ff3ea23dd10063ef9a27dbc85a7a6f1e6e1bee196d5879e6119b1efbc5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF412300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a2c3880c2b6ebe812fbf2766f789a8b92c87a82ac05eda11aa673410163f1. 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/ARF412100387.
Vintage Café Vol. 3 - Lounge & Jazz Blends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4225d7778efa6ac5942ac952b969b89eff98f07b5277d6b60ab53dd43b136f8b. 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/ARF411000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ba9791390bb5aa2ac1f4ce8c72e329284987f2f83bb3c95f60f7342f5e3119. 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/ARF412000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca10b15c909bda0b51cdda2da3344d0b2dfb66c87ae16fcc58dd48748366df1. 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/ARF411900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a97197011cee973582062c1f9ef7135fff636d3080a1879b7b4fac756eed7cf. 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/ARF412300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad8aa1a2bac3abf18fc0469e965345d99e96dd79266579a64657e95973d4b7. 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/ARF411200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4225d7778efa6ac5942ac952b969b89eff98f07b5277d6b60ab53dd43b136f8b. 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/ARF411000500.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 15
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d4519ad198969fd40522177f648093425d648e44b433ed029fa77cf228be0f. 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/ARF411900145.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a2c3880c2b6ebe812fbf2766f789a8b92c87a82ac05eda11aa673410163f1. 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/ARF412100387.
Vintage Café: Lounge and Jazz Blends, Vol. 23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf2a4ff3ea23dd10063ef9a27dbc85a7a6f1e6e1bee196d5879e6119b1efbc5. 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/ARF412300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660461747140320d3363749c8fa39a74724fd0b2d87eed3de4a2d40324697741. 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/ARF412000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209af795cfcdc2c232bb71d04ced2d45063dd8c2f2f5bdb82c891648eae80d5a. 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/ARF410091529.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903a8b7a2827942773c64179e638d9b761c1d1710d4d23c47ad45265e1fefdcf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARF412100203.
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