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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8496faaf4ff4bd7d56c46212095c4caf03292320fd6d1455cf45adaa8615d5f. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c7506ec-4dbf-4f2b-815e-898bdc2298e1.json and https://artists.proofprofile.net/proofs/artist/2c7506ec-4dbf-4f2b-815e-898bdc2298e1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5973e1254ff5290b06d2fb633b0437b7006c1f1c7ff0d4d3aa3d834992614. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR20O2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5973e1254ff5290b06d2fb633b0437b7006c1f1c7ff0d4d3aa3d834992614. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:51:16Z), 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/FR20O2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25b5694a067bcd63424400607d56884e60f085ae4bdbf4d4b43c99c00cd8d78. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR20O2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a5ba0cc219320f4194a82d63cd7cc2c99c87ca2f1fed9d6bb05f905013475c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR20O2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5973e1254ff5290b06d2fb633b0437b7006c1f1c7ff0d4d3aa3d834992614. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR20O2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057bfde5a64e3e7c25a73d48a4d71dd7211e51e14014c54c9263272c32339167. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:06Z), 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/FR20O2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35ed9a17831e3955799db89c441616a695a27b32ff2b5a520c442a3a2dc7aaf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR20O2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5281da4c69e7e533ba769fe1b258db4efee78b0a650116b82546abbff1142859. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FR20O2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6864c9854c407589dd396d29ecc767b05b1668b1b3eb879cdc58c0154baff5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR20O2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb7a71ef8ee2caeff0c668c95cbbdac87cc91402b93f706386a3495a5db9ebd. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/FR20O2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc799e6d3b3b46e8c2f54f688ae4598a27b49cf9c37c6fec2d5cdb345861c13f6. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FR20O2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6664af321fa714083ae70cff6b170e68adbdec2b799ceb354e175255ae7ea1e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR20O2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ebe3c1c283f119ae38445a2d141067aea71522731997012900ac073d54471e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:24Z), 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/FR20O2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368677f22fab9195ffcb0dce1dce3b8dc3240b99f4fb677a6a05e52ba536ad0c. 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/FR9V01300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74247becc3df452532731d19214c2adc716b7d2f7e447b812539e639d971bbe. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FR9V01300002.
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 0x4a07b87e125aa6c558d0b22bf1aa8421d0916f54513450ef77f50dde58675d5a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9V01300003.