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 0x74066d87df7ef7f5b6bbef2869a05cbdffda1a2e503934b4037a60eb03adc565. 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/65f8b657-7931-47f0-aeb8-bc85d9a1d669.json and https://artists.proofprofile.net/proofs/artist/65f8b657-7931-47f0-aeb8-bc85d9a1d669.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 0x774197d692d322eb73974a21451528a9763c34ab43dae559b09d2bc68dcddf6f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPW561813013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf160a78303ab5aa9534a280d4841b246d01d53b19a1c375caaec13eeb25f66f4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPW561813018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eecf44caa82990cfe145f37a3d298701b7bb73c849dce942fdabfb1beabc9b. 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/TCJPS2247059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104d8aa0af1b7a25895b81df91670fe503550bfbba54e2bd120cef2078b8df9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/JPW561813062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b14abef89474db3708c65a72d5d24dc32e803d91a5b22836f36c53431e97b07. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPW561813068.
プリミティブ・コミュニケーション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c268ea1a03d6f261edb3d03b2e76b9fe2635a4143a096d32a0fedb6938c45c9. 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/JPW561813070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02c9e9f5cd2ea53229e3c0cf6235db8ca3be54ea81119d9b696fe032fc463ce. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/JPW561813071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e4dd01d351f7dbb549406dcc3c768ed89a0486cc1b04b60ffac79ab8f6092. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/JPW561813077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3f571a0ce796624b9d0f78eecc479ea99c4de941dd8b611e12573532937b4a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPW561813080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3af8f5d6a84cc4a479d6d772f24f292d5c4f8b713f22d1facf5ec572055f4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPW561813106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4534963495689a099a0e84d3b17ca6c794121db40df07f1cceacc5f4f87e4e6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPW562113025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3884f8d956c3f93b9381fd36f32e85e3b87aca53226c5e23758906e981edd26. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPW562113026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4703bff1491a5deaaa96c27743d750fd4f35440e53769587ee4d5ed9d58fce8. 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/JPW562113027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d67d0d5ee7cf28b759563978c8f28b1a422740a3275e1dea6a8aab265548e6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/JPW562113028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5701673909511d3383f7dc32ac15e79c1a3fce777a973bf6d50f993a3250ca47. 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/JPW562113029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26deb67778a5e311b62930ce989e4e4b75612b416ed455c4eaf7c6f51360dead. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPW562113030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88f8d0b9b1e06ab174727d91329623c4051202a6b332d2db728fce2a405b303. 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/JPW562113031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8256d9a95b8babc84cb031f255651d3d0dfc43e16289f3ed893c2f2ec2cc6d. 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/JPW562103206.