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 0x37ed2b5063ef8698e46ac463cab50ba10dec724f63892aa060774fa730f6ec0a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d347abe3-0ef4-4d4f-b3ca-f96039ef6115.json and https://artists.proofprofile.net/proofs/artist/d347abe3-0ef4-4d4f-b3ca-f96039ef6115.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 0x894ae536d183a5a6890791345c555feedfd5abb3a1c52fd9edf5ecfe122e027b. 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/QZMER2286265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa95ea149ccb13c064d5c289be2968cc7fb33f45bfcef9b59db01df2d457593. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAEK1970070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0869e991fae31ca68627a3b0d0dad75d07e9c5ca106246df4d02835aa1906cc0. 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/TCAEF1959669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d11c8359ddd7e68532ff67fefb06aafc143dcead027fefb311efbe817ec627. 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/TCAEE1933771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2b01f83304977fa1c16eba4fa8a5114ff176eecd956155e3da26f2c0126b2b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCAED1977099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca1bde37924ea662a2f3743ebf9cc67d640b756fd5b617ee26873e4a2513dc9. 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/TCADZ1817583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde39a889256cbeef2d9bbb961dac9ddb138fd3709d2186a645a6ad7f944a2ae9. 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/TCADW1869519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8babdef578bc9b5708c4ca032a262cead71c94fd40f96a523cff03065b36bf2c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCADP1854800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658883fa6fc75d3fda678374b81e23150b9ac987355388ac5b2c13e258416cc3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TCADP1811339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea3583fe99155fbfd1dc3ac6f7f7c397b66b54461a7fdbc26e1da4b94289bae. 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/TCADN1887157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b812463a00461f3bb7c205e8975c2d1701cd90d36057b6a32c51ef45396a90. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADJ1733835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf9eb3176b5b8d3e9cc31063f88f2bff591e11a52485e94a8e239a51fb3b03. 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/TCADH1730945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889cff4dfeefeea7dce72e84e583374aa60b262af8d6efcc526bd36e8784ac27. 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/TCADA1762675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567ba245996f941d0d9ce2aca20bdc9a54f27f80a97a5f4f7c20a885bf0f93b. 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/TCACZ1724621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff31a8c02aa922d8b911b5a2ccf76ec34481017b6e1bf8762e94fcf539ab4d. 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/TCACX1708678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f33189163ff7334b2e7c48f6b36605ba88600f512049403ff7095d878197eee. 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/TCACT1692074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c63b0277b2a63f5d8c417fb9d0031ff4b6c67d11ed9d22fd7cd61c4483884b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCACS1695871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302b3bf394f8fc2c3c1a70a7db283fd20f8ef29b9c9297046a7209b70c11f3fc. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TCACS1605961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4552d432681d3e6ff68c60b5b902e5d8fd3e977cbbdab3cf3a241b4de80bfa3a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCACR1644420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b448edfa7c06f3c1555527c0cda0518421032e2f85b0761b603dcfc3d94dc8c. 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/TCACR1675099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e96a2b8f179e6c73c5a02201888b6adce4afbc5e8d841bc196c873558a3f5. 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/TCACP1641221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa159f022de3e312f2af5579aadd0c4c7665c22c801c70273ee0493e9958265f5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCACO1670293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e99209394c0c534c46669387154e55bd708eb71ab9205702c8dbcf04d0bad0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCACN1698428.
Gændalf the Grå 2017 (feat. Oak & Benjamin Beats)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e792b6f257d78a5fa2d8a2aa2dc2e485460577b1500f1796de776962ea3605. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/TCACM1680053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463da534d9a8966766492814856b155a5270a7fe8cb2e62aa56f4ee8c49f599. 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/TCACM1686281.
Club Kids 2016 (feat. Oak & Benjamin Beats)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6c6a5d1f598e40eac55b21f8e46a16d243a24a2c298710bf7929d3e895f90e. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/TCACK1528465.
Peaky Blinders 2016 (feat. Benjamin Beats)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063b89a46804512f0334c14c802e5aba5870999afb2d117e8957678d0a1ae2a. 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/TCACJ1568630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b548a4381fb4bc6257a1f7c361dcbbf5a6b6b16844985ad5efccc3e288353b7. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/TCACJ1501097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff4af8823d5b03eec57786d7ad05e9a93624ed42dca14bb6cce7f6cd51c8b20. 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/TCACI1589494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c63e9f9aa96f71b9affc4ead6d667d4c463868bd6f29d29a3fac3bd7da3b0b. 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/TCACI1540624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ff7bf0a804e36465c2f5fe47a748be5e3a6cab526a29c43dd3236c5c11e5c7. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/TCACH1544794.
Sjøbua 2015 (100 K Special Hjemmesnekk) [feat. Egeland]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82525626eeb47fd33daad794705e9ec2cbbbafdfb2faee1c03c264ece60e9e7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/TCACF1578819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba92abe911d3f341a15e089be0b29f4d2c4f17d9b6aeef240f3fe728cbf6953. 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/TCACF1554479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38ad2a0d017d6b49eec84091c78f35f2383c4c09c57f72c01b2ab92b1366327. 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/TCACF1518304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705c76040b772592506420a5f990a6e12beba89dd6594e2f0a809dc7791fba4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCACF1505303.
Sjøbua 2015 (Sommerlåt) [feat. Chris Baco]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3f9a46f43e55ad88a8275cd4240a8611a099f78b550e3bac0a9a0569fa6999. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCACE1576039.