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 0x68b999c201b654e1487dd0f67f21f79b44b1f3ac342c7ff26b9be5751a3433b9. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7766e41a-9810-4da1-8521-09535c60c500.json and https://artists.proofprofile.net/proofs/artist/7766e41a-9810-4da1-8521-09535c60c500.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 0xff98e472f8fd28a6337af517daededc127ba9f4ae4981b79b0d1fecee7643283. 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/GBLLT1601862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b136566acd6917ba3dad016c063d90532b6663a85b56d620d3fd40adf1361a8. 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/GBLLT1601863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3056fd68b5e13fba993e63ddaa4a178df65c1df15e2c0dc1960faed718ef68c. 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/GBLLT1601864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbeb4222ce07442ea6f24da39e55d9743eb589c11b70400417234368c7e1755. 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/GBLLT1601872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a692ea70555f3349c1d998e1d0e95db5a0818f8a7cea3c555e9964be0972871. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLLT1601873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ab3bbf185761b1a3d820efda097ffa9192490d81d18b52032ee6bcc27208b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBLLT1601865.
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 0xfcba950a2f64b48a9169a6a2bc0e79b7e36c800f0fb5d421f5f8b514fd954005. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBLLT1601866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e9a8dfc6f7eb9d7d53278567df128d311aaee7916d344c4866d0a6757c7d75. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLLT1601868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf151c3068937d06d479165444344db20afab5fd7f4a68a868a7cabd1f08400f4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBLLT1601870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a7240b55b3731d4f31d93b5fc249c65926606cba81a4f134114881f4310f0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLLT1601878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25805313d56475981bb3d3088a62720b17270fbdab2044405191afd96b0e877d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBLLT1601885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaffa40bb3392cb03a5f9a1fa2cc2bbd78aebec1eba8d9a222b1e1f6d480a34f. 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/DE1A12129239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6c89172a61e785a872c2029b3594fc062356bf61c8be00eaefe7d0d04c239. 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/DE1A12129240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f03e6dcbf969ab01c4f60a9a571630b08222daa8df92e6e5821f162152376d6. 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/DE1A12129242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7470779b61df1b97518e5520989be2df8fd8d5622dfda16feee196d2ed8003c4. 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/DE1A12129266.
El Bulin de la Calle Ayacucho - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07540552001b3b60a3fdc9eba383a94c98cd932a3eb8d638dcb90678d4602e1e. 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/DE1A12129248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae082caacee3a0bdec3c99b2f2728d0f27420823c2008a6b921c094bee93b044. 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/DE1A12129250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcde7c2714f07639a1299410aabaeea8dbee34b28e7ca09decea59f3c4001a9. 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/DE1A12129274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e6cbf61b5c42bb36ed1c793324c098940c687df2b746fa7bb78c2f8e975605. 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/DE1A12129275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59271e7c51292befdcbde5712ac59ff3e83d0acc8b1f3b39693efbedfed21eb0. 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/DE1A12129278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa0fd205c5d98e6eb01881de32b48e5655a4401d92e065c233a8a35b74b3d2. 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/DE1A12129279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ffa5850074e5f0fa9ea041b9754f4bbe7881c144634c9035b8f4b7f2faa969. 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/DE1A12129282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cb24391461fa6fab0a0bf1ac81af1efb324771e2a7a66a0006d1000582b70a. 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/DE1A12129283.
Carlos di Sarli, El Señor del Tango, Vol. 4 (1954-1956)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e0d6f59c54dc48e9d6929692c8eef7c4689b1da63871e98d6befbfaf84937f. 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/GBLLT1612240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b44b668186fd4019aa53a8572a7610f0cb3a12472cfba080807e53e287d3e7. 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/GBLLT1612249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a544bef776bf9717ea7f337bd21c1273bbc0566c3558b9a57bb9d32c1eaf0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLLT1612241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ecb277c22aeb01cc8e9577fce3c0441e020a4ed868fd4ca971fe2029b39a8d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLLT1609715.