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 0xddc2b661316b6278934e124a55186da96d2209171430cf9c9f84d207aa4b123b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a6902c-9d06-4151-9df8-48ef277730da.json and https://artists.proofprofile.net/proofs/artist/21a6902c-9d06-4151-9df8-48ef277730da.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 0x4f28e94302deeb4c613cdb8f28839cc6cbe5bc1085dc3c94305b62c636e49201. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CAD941387607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be3b0f230cc8336c3ecdbb8e7965eba0cc6bc27876d8113f5a51559136d4f47. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAD941387612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee3db0b3c6f410027d1534218f2d2e44f80ed54f4a995377deecce6a57f715d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CAP681644001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0336be97c0e5fdd88fd894767803b8cd057669f21860a1d0ed420502f545d4c3. 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/CAP681644002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450a04cdfb13d6ad5d2976f8ea7f00b1430f9391b7df31b594fd372d2b6ac41d. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/CAP681644007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891154780a2e05e70e3e285bb1a863eea90afad44839a3fac3c37dfd7736169. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAP681644012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdd648ac150e9ed38be4411cd637d5cb326bf41770460afaed62152044e5702. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA16H1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0401a68875df99a4722c668f286ecb1881f16f8714330e46c816bc7710b66e6b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAD942200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549980efcd8e4292aed4cd8354bd01dcaf4b4a2c1aba902d6b921c44d0d035e2. 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/CAD942200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc4fa21f4319e52ad1a594a49c7efdf1aeffcc75fc24e02c661a7925677ebd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:46Z), 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/CAD942200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c66b859546b3c8cfa76891a58a8713baa311c571ef0372f2e5bed077d302e55. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CAD942200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed33525f0aa70b4d8f18b2398eb76200148814d3273c985670ff65bca72046. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:35:45Z), 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/CAD942200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c221d1295a1d9a754b6fb832f596288df40a04b1c9eeb13a238bcac740c48. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAD942400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47ef0856b6a86e02003a39886cfe1c12a6ce5c6d2a1f9ebc3b4d618eddd9cf3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAD942400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7521de88606ed8440320fdcc377efbb7ff3f3bd9697f81c7af15af3d303577. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAD942400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8974032db4adc1c6a367ffe1dbd8625db9367f340ec8e0fe8deb4be788d1d3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAD942400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0dc83cd3ed390569cef5158cb6ce62039ca57399f58191d0de5fac0310d2f. 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/CAQ521807106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ac13649413a25cab534a794477b822a7c52ca09021b7407b07f37a3417f9b. 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/CAD942100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc0e54e23f785c5ff839bb73dc2f19063b7f8f6ecc3a3cfc5ac84666af16410. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CAD941286205.
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 0xdd0c04d7d7e4cde6ead969c1ca010497125735ab518de230467d0d5dd79fdc08. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAQ522130005.