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 0x60b03085fbc53be5695a6a1d2c7b30902f79dc97b62c2e6b1d6784af25da6263. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7827c72c-f2e3-438d-a0f8-a55fa88aa61e.json and https://artists.proofprofile.net/proofs/artist/7827c72c-f2e3-438d-a0f8-a55fa88aa61e.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 0x1a0c928e92e62a61eb0a158ae57d8a003958f88510c5b47e7646d49fc821a28d. 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/NLY8X1800332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17211a178ff9e37526bc38ab03f2400a9abf0f887fccadd498936cb01cad047b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLY8X1800333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a1ac2776f958e56316de7a3b0da00492f95f3caac89d75ec958a4f8901af32. 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/NLY8X1800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be3428366289b52789ebfde3205735fb932f1ec39769f3a7df35cded2ee88b3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLY8X1800335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd171bdaec66d94709bf4146f3bf6254502e3b74700c94ee65a0f7d5560d5303. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NLY8X1800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782d62df86e533256ebfefae8d7bf8d3f4c2f2fd086661bbb011ba5dd94684f. 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/NLY8X1800337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8fd3610077f06410622fdb2c15fbd3342a9d7fb53e427f6bc545dbc7c2c27b. 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/NLY8X1800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad7c584d1f0093a8d50683444450540785797375525c8b34e5afb1ef18469c. 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/NLY8X1800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa756fcc82da0377e4fa1b10790262b53954e5aa86eb1da695b5cc21c2f7c105d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLY8X1800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc79cf8373a0e9a57554bcfb474212c5851bb886b8d4f0a2d3334563b89a3ee1. 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/NLY8X1800341.
Verleih' uns Frieden (Da nobis pacem, Domine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797bace80dbef77f03d7983f06efc74353a7b601a69155f0b5c3b0d19f7e578d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLY8X1800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d5fa4cfd3d6ecb2ccde3e4e9795ce2c0affa3c3fa06c605080efe1a5ccfa1e. 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/NLY8X1800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0535cd8aac1674cfb9a3ca8e52b62a5ae3c25f39ec6cb8e6bfe6c7e10870be. 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/NLY8X1800344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbc383f862c1f2de2c749ef610c5d2e5adf07fd2d1e54029126766c90b402ed. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLY8X1800345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0d44a400c0591c1d0cfd663e84553dae7c09ef79276f717eadf240d531a1f0. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/NLY8X1800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2747386519171e79e641fbbace0dc96bc3a3cf1a76d9b563d3df31fabfb305. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLY8X1800347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4b75c7bd6f39ba26708414edff79d531fd8dc7f7119ae19a1a9fa4c7958892. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLY8X1800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925abe8b473c4ed22e4f4cfbed2e57bdb2b990ef5e10d6bdcdcc37c1989d1023. 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/NLY8X1800349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e7df2561c74cc487e04f34f610cf558023b777ac004b9c9775a6e22b67f4b9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY8X1800350.