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 0xd443af5f5bacbff22ac3f6d411bde2739c6bbc99aaa2db4716834a5913d5a1ea. 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/18c4cd07-9053-4953-bc2c-2a47216007a0.json and https://artists.proofprofile.net/proofs/artist/18c4cd07-9053-4953-bc2c-2a47216007a0.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 0xd115c4a78f6f52f7a08964ba44dfb6772d543d8e4492dce3e2c508c454885c24. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/COF018900527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19633fa98fc30b1c0ff3a81a6d49552e1e2abd8f3e71672bff0d39e5a5bb489c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/COF019400463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a044238225dfd127ee73f37bccb5a3060a267c3a3c2e3b64ecea024efb36135. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/COF019601142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa980fc335f4a1d095d85a5034072fc512d106162f18e851c73dfd8ea009215. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/COF019501739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98251232f718452e6cd4e8122b671bd00d94b916a3409fb6fe8ef6b7a4c78338. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COF019000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08b9a7d0a81e43c8044bdb9e95ef1e7759dcc9fcb6393a764a4c03bbd4ee24. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/COF019601352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d51f9337d1e5e6bac49d70e82691ed268f5781e55849608d3370098c8cc9f95. 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/COF019000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa980fc335f4a1d095d85a5034072fc512d106162f18e851c73dfd8ea009215. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/COF019501739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98251232f718452e6cd4e8122b671bd00d94b916a3409fb6fe8ef6b7a4c78338. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/COF019000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840a735c60d624a87ea044fa2d253b7db36000204d47b260247638d1152e262b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/COF019500666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fa2ceffc70d9ae799514eef45af49c4dc2b30be72aa8f6cd6aae0ab1189f77. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/COF019601354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3dcbe833e6c1facaaf1803d8ed7320e9ab282e7f4b441beed2f544959f2122. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/COF019601133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6588a86326f1c083993267f87d1bf47e19d1b1ad56d3940c7e3605733df7eb2. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/COF019601029.
Pistas para Cantar - Sing Along: En Navidad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c5d8d3ee1b44e9e578c22d77ff8b4877c6297f0e48ea4ce752fe964898b29c. 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/COF018801427.
Greatest Cumbia Classics Of Colombia, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc3c30c9716ed842a7c50936486fb1a4ef90032346db8ac92e4debfc7dcc111. 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/COF018803837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b1e2be10678f320c6a21bedf0472931120dd6bf3d2425bce56f6dee6010782. 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/COF018900529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204ee9b10558deb6a2b3c48fff01c5ecd7dae23012ae78aa00e918cde4ce956. 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/COF019501699.