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 0xa2eeb58ad5c56334535e72994c5639948e4d5b44fe8e780abd6aae36dc2cced1. 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/2a0417ad-8335-4bbd-ae3a-2175b019eb46.json and https://artists.proofprofile.net/proofs/artist/2a0417ad-8335-4bbd-ae3a-2175b019eb46.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 0xf9f0409ecfade227a42012be0f34548620e0dd4554c2828b7719e81cde9d2b25. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR2X42177999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844bcf1da2e4a72ff6fbaf18f89efe99b7c4ade87361eb3d5f44d47e44cda273. 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/FR2X42178001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e04c81e089b1341c388a67d85919cb06fb16a234aeebb11ddf79306d980c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:47:03Z), 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/CH0832401290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e7e43ee1130296b14a56f49872b061d8b0d3f4838b96ab40bed89e3f75335. 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/CH0832401300.
Me Partieron el Cora, Pero Hoy No Se Llora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee85af983bd46cf6c20f1c004fb2574df06d7e1589fb8853719c30148ac08910. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CH0832401320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082a99fd50762319e56b2125044093d4c25d3b02e155b66ac01891ae7ba94ff1. 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/CH4061901667.
Way Back Home - aus "Sing meinen Song, Vol. 5"
Sing meinen Song - Das Schweizer Tauschkonzert, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06811e868ad661fbe16b39e007c6b116e6159a67bba4a76f23ad1954f9aa4c57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH0832400060.
5i Uf De Uhr - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda56bcb597b3783579c8d9ea2b28ffe25052d3204f90f6accec348ac6c65bc2a. 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/CH0832400090.
Way Back Home - Duett Version, aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab038821b1c0a394fa2865ed69d9a2e488b3c160934e27c684110010cf58e7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH0832400450.
Keep You Safe - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c415e03c997f832f51dcbadd167e58151cf2e15fec69e8cd5ebeed9e11e6fc. 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/CH0832400170.
Keep You Safe - Duett Version, aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd6c4cd0312be4d3f958936b1b6e26e0f4394a5124386a86dd3bea0aba7da6. 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/CH0832400440.
Über Uns Die Sonne - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21edab534df165d31134b34579efd7ee941ba110dad26e0b131023fa493612f. 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/CH0832400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8bbb82ac1b1a7cf6885fc7d2e9987308211c1d086c1ef82acd5fe6d59583f6. 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/CH0012200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ee73102dbe47d1e2eb874baade156582c20350cff6f7deb1ed981f070ee8d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CHUM72100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082a99fd50762319e56b2125044093d4c25d3b02e155b66ac01891ae7ba94ff1. 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/CH4061901667.
Hippie Bus - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349d303d62f9ae792f1874dc957e62545cb4305c47c33fd63958cb6dc2dc4c4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH0832400410.
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
Boys Do Cry - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71a9a7ae3abf6a496a1643be4e0a86cb1621ada4f246188f03a735410bcf7ea. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH0832400210.