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 0x2c435c3ebdb04cd3ba5f72f8b0a87bd1dfb165d73f01a541b72f71ba5db3e15e. 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/f466a839-15ca-4188-95ed-990ad07b666a.json and https://artists.proofprofile.net/proofs/artist/f466a839-15ca-4188-95ed-990ad07b666a.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 0xcbfcd6f5e5aae6654c5db12e3a547fe26aaf10c0e7517ca9b8f1490b6c5d6e35. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGLM1936461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1432b0e2923368ebdc9ba1b9625b8b388e2b070b46decd063a43484e2b27f7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:32:20Z), 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/US4R30919136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33900d2c4902f84a0ce26f026ed8f6bdf521ca5163546d67fb3d32b947cdcd15. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:08:19Z), 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/US4R30919138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c437e0521817f2e2ab5694a061420e13309bd7cc87d0ace2bb474c8d9b6d5. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZGLS1976523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e3f901f769e0aa4045c7d9190e61b9adb5c5be7d69f0eaf8f9bd399530057c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US4R30919981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552e17dfce3697ac07e182b4e049b6267e4f98c89bb5ff82bcb9c110610e6855. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US4R30919986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f26c480b94df1bf0036881d5ff7e4bd4da4aefb12ced5d8dbe99bf553a0ef. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/US4R30926443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f5ef127e8728764dbb172eb7c9b6c37f7ca66e7af79df2eb5d020f5611f8c0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:52:12Z), 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/QZGLS1976463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e4788d09e7975574202cb4c9267f921d7a7fd444bf90389b0d48e0cec1fddf. 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/QZGLS1981112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e86d1a8f2637cc930bbfbfed7edf80faa845611f1443a1de1cecab534141bdb. 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/QZGLS1981121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e24dfffded2b45073cfcb02b4c27e9993aedfb00366f5fbfbf73f6f39c33fa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZGLS1981178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6120d5eb05082c6760bffe71b202bba969dc98b70edcf4ac7e4ebae058c02e. 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/QZGLS1986188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32531454a3ae7af182fa41e204fdf76f2aa02f92aee0d65819cf12c4127d71a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZGLS1986190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa531c4b1714a15fe1d51ba1cef960a265da6c9be2dadab3f33ebf059bfb9ce1f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:22Z), 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/QZGLS1986191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d6f332d2a3d65cc8043125dc2d4961f477b2fb8c51ac45fbc54028a8deb4b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZGLS1986194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f3467f1179d6b6500c4cd2167d4b6244a5cb135d7713bc47daca33f583fb0. 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/QZGLS1986200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f499fe894264cddc33312fec6f0cc0d73224cce465233317d154471a9ee86e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNJX2183460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e970a5327796a76b4d54bdecb82055bc692705e4c4a4f5331344876aacfcf6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:08:56Z), 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/QZNJX2183461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2adbd2d7925777b8649dd31716bb3d059feb9657b94e68bd840e9856853d7f3. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZNJX2183462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b08e2e0a72d5126d3f33614e2fc53c8889a78d91fc4bd1f42158c2273b09a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNJX2183463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc53b3c68f83ff9c3abfcb14020854acb1c426f2bc215d8a829209632615e0d4. 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/QZNJX2183464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c54305199c72c0a5a945e571b34c92a40beffd1194a7d73753691461898f79d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:22:57Z), 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/QZMZ92499962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c74e88b42e6cc91852c8e572c622b9acb860fb5123e8bd42af8d29ccd95ee5. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:43:52Z), 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/QZMZ92499961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b442b0f9890005ab991b6e4f63b77fac2f39cf6e3e05fb79dab215d8a1a7709. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMZ92499960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c74e88b42e6cc91852c8e572c622b9acb860fb5123e8bd42af8d29ccd95ee5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMZ92499961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf286bb187e9e80e795822b171451a1b910757ebed061c20b5a9ba01990e78fb5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMZ92499964.