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 0x8551dc41ecb66fdac7b2e183757306df3616914889f977e7a5eec8fc0ab40daa. 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/4e7fdb34-316d-40b3-b60b-9f9097ce43f4.json and https://artists.proofprofile.net/proofs/artist/4e7fdb34-316d-40b3-b60b-9f9097ce43f4.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 0xc605f9ac22053d6529216c598b5c6fe3339d49e8a661508950b47588b103719f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PT7EX1900108.
Os Tempos Mudam (feat. Kosmik, Sandro & Naughty Ganja)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe8f13b15a5df86cb07d32b55c5ffa0062ee8b9ca8d6679c09e4110861b08bd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PT7EX1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50f83d80eec137afae10f8b6a5878f785127fec88b4a0c643a4923b9cef676a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/PT7EX1900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139aaabba75a74cd4f23513da03c66846ede59d511dae496889fa62ea5d1bc2f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PT7EX1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3380467f853370e22844af55c3a729bdcbf248c83b24630a959daca1fdf98e50. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/PT7EX1900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e818143b130be605cb428ae3c0b07d6372bc26378b93d6e61f55e60caf222d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PT7EX1900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a893bbe3efef5e962ec5f56c9f7367cc790c0fb233e2ac37aee51d6ee6d7f67. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PT7EX1900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1cf204a88bb76d8466d1b46f657c4bab01432cc13599cd936b794ebc414a40. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PT7EX1900158.
Prétu: Waters (Pa Nu Poi Koraji) [feat. Lowrasta]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf3a1d253bc2b15e75943fbf98b30c3ae8fe9b8f26b480fb8c62e08e17647d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:35Z), 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/PT6LV2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761def7ca8c61bf8689af91a84a66a8df567d8e711e5cc9f4a53a9368b577ea9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PT6LV2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fb5715052379275b4053887421c1dddd70973a59247deb0a833bba0e301bcc. 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/PT6LV2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab67a131fd64c33d6fabfb14a269093026050835134b3e5cab9451f46d8a876a. 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/PT6LV2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59163830ffa47addac32b825604485546ff9c48c40dbf7134bb486afefff4f2f. 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/PT6LV2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf199342b4973d5f041c5ab696cb050015a8d431e89c1a36fe3a9dd074ee16547. 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/PT6LV2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dfd4b9a2e756db034537a5c5717e31e8346d3090656217c83abe619d458037. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PT6LV2200001.
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 0xefe54c18e038cde88e975d8009002b769d4ae0a875c686d96c730f22a05273a9. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/PT6LV2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb5314bfc28adf0fe4749aa16053eb47b248fb37cdecfb04e673bd3d365dc5f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PT7EX1900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5af35465e7c11e623cdb6f2363102c4cb1bdd867c538efae85918995b0db8a5. 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/PT6LV2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec25efa90097be0c469ebf4c25356f8d650af1b2eba68438ce6fb1a58e1a760. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PT6LV2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3edbf8acda58dd542ffb81bc091c4e6a086470074069f0a48df08e19c83ae98. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PT6LV2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b855ef1c044076ca132396a803a3d5bfcc17060c90017f0e2260ffb99da982. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PT7EX1900216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051efeeb215e54294c798b8feacea065f66fff7c7bfda2bbd71536471da1f5e3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PT7EX2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e14d3355b69136bdb4df5a66fb7cb91e8a28f74993e3817ca3abd809a61f93. 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/PT6LV2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f44312c9e388a9bb3aaaccc170029ad617301920f183a5e969474ef098a880. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMBZ91613264.