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 0xc95a10cb2af85b0fb6bac48a69e607748dcc1022dc6695509d879a81d9b24763. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47f16399-f1fe-4b7d-9b01-7b4cedd2ec71.json and https://artists.proofprofile.net/proofs/artist/47f16399-f1fe-4b7d-9b01-7b4cedd2ec71.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 0x49e6ffbbb434817faebbfab1b57863b78bc922219467b57c635f886c0b3dbffb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2P2343315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5c62dab5bef6f4c213f5fa10cb7a5f70d723b8552de7e1dfc919a939592d9e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TCAHF2332916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19efecff667d6296e0cea1a442857675914a98a03666c994513f0c4d44de8a1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6L2334618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4ca0e4f6a863382adf8b32e49da4f4f16cb7713dbec5c56a672e283f2cdf9e. 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/MXUM62300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10a4a853c3d46840d2778d499cd585ef61b383dbfd529643779690b2903b015. 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/ES71G2237502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42afcfa818074669dcf964811ff28f6f68cbdc6a26e81df70e43be6283e08530. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAGI2262016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8b04b8d6bea38ff59a34b4007b0a12015dedc35027ef0021495b9d4f184b57. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHZ52268319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc2639f1926708b0fef7131aef070667716b7bfe061ae8e64f6d02528121f1. 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/TCAFS2103127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139c3f2fa1cb7821de21fbc434761f0e5aded2faf69caed635922c5eb15c3747. 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/CA5KR2143668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dc59b3bab0400852568b5d2027d2efa16a8abab37b2b303b846706335a3b96. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ72165677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999756c1fbb6e7c68fe85a2e0dcb54d29d65fbb39c7e20b4cda5019111faeea0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USUYG1330061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a0dc07b74f36ce5361d7a3612d3e5cf4ac479699f863400b5dbee5e403f4e3. 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/USDY42065877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c58813d9a7e48dc36fc992b1eeba440d95dfdd14a5a601d018d8d653ef2de4. 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/CA5KR2022877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40270f07be453c17e75d92b426aef254012e9326d48aa3aefcf7f84c1214b8e5. 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/QZNWR2591237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c5848c9117163813993ad24bd9028e1d84a4e80dc7026848f22378dec92489. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHN92539616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc53d66339561edbe5ad2ad0d21617fd5d4017df6e9b33863226e2843512815b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTAU2499743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed698c722c44d059fb401afa85dedb4a08343016baf9d05ce575596005832fe8. 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/QZPLS2411209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c33dd4bdbbc015da6929b35892ba128c51a7f3f11575ed8163b511f9f019e4f. 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/QZMEM2411774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc77f8213cb72b299f75cded831d1cf88c9554f9cdedea4ebf56d253ef87082. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NL8RL2403082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe348c21ca803329015a192f452386390bc5d2987b9ab231df7e4cc0a4c163150. 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/QM3DF2151373.
Barong Family presents: Latin Family, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e8639fb18ab14b036c4ca3ed410c75b15efd275eacbfa8cbb4ed33cc630e89. 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/USA2P2017922.