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 0x8ac9f14029f1f50604752ce6332fe722404fbd265200f5a15d1b71b665e71801. 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/a0dc0fb9-7f07-4d2a-8d9e-877ee4eef501.json and https://artists.proofprofile.net/proofs/artist/a0dc0fb9-7f07-4d2a-8d9e-877ee4eef501.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 0x436a210e29b22cd683e7d387d0368dbbb375ecdadafeab72c08980ef2b85fbc5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEZ651376959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741721a63ed6302d2a5df646e32e0a499990eda728a23ad5bde7bf9ebba8dbf2. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/DEZ651376962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f0f43620dd28feb91fe1c9ef02679ab3c00f131f9fc805e7ba5df11a53e5a3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZ651376968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d25c9865cbe4ee1e7ff8f55d19ac6e6aae948fd81d91068f789960aaf1cad49. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZ651376971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a8b5553ed42be51ab1b952fb181ac011e1d8b0bba757a7d62a09f8d39ba0b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEZ651376980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa332c463a377e9127fd31d5716ef69fc28937f5ee090d05c2aab93a81de18e6e. 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/DEZ651376981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d584383d908da562368c98428ec6063cac355461604e56dd7fca18a5c660671. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZ651376989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5763d44a28b4e3f77c5a73e5b776f8d695fa1403bac174801d3e53e3454d1e6. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEZ651376997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c781f80687e6ecc5870b20be2811885c09d904a99ffdb726f3ac0a6b8170581. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEZ651113634.
Schlau in die Krise rein, schlau wieder raus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8905c59cf08199c52e2ab0440356f911226616715977af374baba0607878db. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/DEZ651113635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a237ae90c72e0aaa346be4eafefb9e775b01c1e2319faa79644ed607656291. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZ651113641.
Der 24-Stunden-Sauf-Workout, Pt. I: Die Gezeiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc963d37a77a303700e49a7288226a801a184e9ca14ca23801a00e9ccdd8d0b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZ651367640.
Ich bin von Kopf bis Fuß auf Hass eingestellt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38389ef748582138e19d53ff9d02f701e01296c6570e6ca11df1ae99710a36d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZ651367644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26b06754811ea7568715c90f791bd3755dfdafa1ee76a8f259908dd1b386f95. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZ651367645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4023669bb3147ef142a3998836c1f96a9de110a49cef26e5008619fa4cea9132. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZ651367651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0184f05d5aeb6f599570c958387a247e59326f96d68088954de7024292d62eaa. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEVF42200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f16cdbf81354f0e8565984958990ddf3b9f91ddd2266fbdf578bcfc0a41dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEVF42200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17b1b5936c205558a6e5e4bc00689a1f41d08819942956e7b3b44fba941a1f5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEVF42200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dd40900b25e008a2550416f0e5b5cbc7b952de0aa82bfe1358f3694f0db02b. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEVF42202481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7806422b59e48de8a1c81b2f63468da63b79bd7acfcb5ce54f5123dcc3211cb. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEVF42202484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebabc02cd27af0b715012b467cda1f1e9c996d857fdef5e09d257c9df3c88100. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEVF42202486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79579703720342de0f4e4926905071fc641045334ad08e29b8de3e0b0fb878e0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEVF42202487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e7c1c9bf3a32fb63bdf4da12b73ed15560d1d9614c5e01dcacc8d46229f32c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEVF42202488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff355673fcd6c373acb3507c43227370ffb3b9cc0b4abd3c32331bb23812459. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEVF42202489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54691979d41d63a28c080c043f52e1b7b54e91237aa89b7e4c9d80b72ba42b77. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEVF42202490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd32bdb08384906f55cd4a43fff480bc4f7e558c69e63dcc525d8168e7a40b4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEVF42202491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e23e8ef7b22da9e0952f4e7392b87f328f220a7caa3018ea2d28d937f9477a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEVF42202492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb322adf0353ddd02826c3452dd6ebb61c42f95ea09d08346b1d99dfcc97e7982. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEVF42202494.