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 0x5ae5d40631e47b7bde5ae229e355f251b7a7708265dffb2790fb5a61fd23cd09. 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/20711288-d7c8-4f75-93ad-82610cd08837.json and https://artists.proofprofile.net/proofs/artist/20711288-d7c8-4f75-93ad-82610cd08837.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 0xc01ba934a0746114a14342dd89cf237f87a27e955fbffc81fb3a06a03ad8093f. 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/NOAAC2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e55b03cac2c3e9ff394374753b1076fc7d07b9449480c5a9accbb43dab0cf. 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/NOAAC1900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c01b7471181a0e47701bbfe96a5226170ee414f33c210fe62fb021c1f9a877. 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/NOAAC2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a77f91fd4128a0f09c77f12c86b1375354563a79aaff961ab20354fc8d38d1c. 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/NOZUP2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f830f2256384329513042c3990b1c39bf180a0648d5fe52e29177427902d6b9. 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/NOZUP2402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7fc877c5c892ef73375bfbc143233a0d17fb9191b8b9ceeb924c00bbbd442a. 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/NOZUP2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67aeda151f4cfc16e03a99323d6dcf8628b9ced483cdcc7239ea8aa8e810194. 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/NOW562200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff30cf887be7fcfe4767752d73f3908d1746b4f1fee4998132f779fd27c433. 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/NORN72200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0963f0e8302f8063c37892e2f606e36a0773fbb3c70ffd56d52da56358cf95a0. 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/NORN72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a5c4ea51a06fb24131ef7d3573c07a3ef73a051aeafbc524c3d254306dd090. 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/NORN72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b12ddcd43fe4b08bc63755eb805f46d7af04a3aa11f70ff98492ef4e514226b. 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/NORN72100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34052db82f9d0b9cc79bf03db67f729852ea09c6acb4e4803cd70a1f7645998d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:17Z), 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/NORN72100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5c9dd8494ba0a5c222ae1fc9511896b9689a7a3972900a2bb5eda4577a4781. 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/NORN72100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa584e4012f2df65c700019f41ca5248aa576918b20149188071b233069811010. 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/NORN72100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b571c9e410c818d681d30878adc075559c484af5374f0ff40b57f0c579c19b1. 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/NORN72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7d989202fbed4d8bbe18016d3772622e0154998f8f89313860fac95b29951d. 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/NORN72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804b81533328adf683ccbf3b08e77ac2c5213e33144ef5d73f7f466f8106f38b. 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/NOAAC2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b3e634e04ad0983bf163403cbacd656470e6c1146dda41677cf9cd08a797d4. 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/NOAAC2000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c01b7471181a0e47701bbfe96a5226170ee414f33c210fe62fb021c1f9a877. 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/NOAAC2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e55b03cac2c3e9ff394374753b1076fc7d07b9449480c5a9accbb43dab0cf. 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/NOAAC1900079.
Unnskyld (feat. Angelo Reira, SINDIO & Breveglieri) [Remix]