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 0x4f4561af89c6ec241d0fe3d58c4c799d433a4ce79b48141cd03b27339746c23b. 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/87ad2bce-8dee-4b04-87ba-c27324ffba26.json and https://artists.proofprofile.net/proofs/artist/87ad2bce-8dee-4b04-87ba-c27324ffba26.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 0x3d34bad083b468b5ce6268ba7f881ce8101f1a40a5738ace7380fb5be1be6435. 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/QM6MZ2201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7139d911f1adc617ebf2c858afacd2a30e53b69b956db2548081230e9919fcab. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM4TX2282820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2f4bc1af0656f1c213b474e10d36208b5cf3c8670ec2aad6957e80bce361b4. 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/QM4TX2248996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ef4c835f83028adecc029b22219b13c54dea34da1c68bbb748bc053d096172. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM4TX2248997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d9d971ace38a1f009271a9cb08ede011f15722708320add71456a15c56dbc8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QM4TX2249000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9eac7b5ecdbe4ac7027a1c7f3fc88c1392cc59ca22ae17f5897785a3fc8345. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM4TX2249004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb810a1d04aa45f4094866584e8a2472ddf75544379deac758fab471e12558ae7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM4TX2249005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774ec921a29c98f53686a53eb0d2917c062c5178a70afbd7ef5f98f31cb8ef11. 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/QM6MZ2201869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f04ef7d95ab99941fcb05b68493b067ce603372657ae98633ce9ede2405295. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM6MZ2201870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be494470274a153d66570a46fad93003203ab8a238bcb28ad26bf5536c22c5. 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/QM4TX2238028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e39168604fdf66ab88dcd5b8c38beff3cda71be4ce9a709fc32a2e1829beac. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM4TX2238067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8fb57588fc6d7fc5f802eb235ad33e1bde31265301d7f70e7b4b7b5fb17b8d. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QM6MZ2271526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafbe5822e0127eed24af453c66f9b785f6b87efe9ee47e244a7c111235bcf4a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM6MZ2271528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263b4a3610c2176d281d96aa08ef534ed6c3c99af24a4240fbbd5663b7bc5464. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM6MZ2271529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffabad93e6c047b2de7b7f449bca82b3733cedbe68c98a65bdf021503df08fe8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM6MZ2271530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf0e15603c4db869c01b86d9839ee7dcc34c8ffda2178b41cca6f5e402a8fd. 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/QM6MZ2271533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb57cbb17ad6a6d8debb767a7dc67bac9f1d032f4c7a8ef7a9a29e72735087c. 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/QM6MZ2271534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a316a73b38ceaa29d6185573eaf7c2f5ef32358df46a430cd86e96e5790b4d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2271535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5684c4a13ccda181d308fe51c00995f21d6ce898369da2d51d4304d31f536307. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2271536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf75cae1fc1e2abd5116418d0694aa52fb7fe17551d579aa0a4bf8601414b98. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTAW2304990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d442fb94a2dd6b09fc1a8f189803c3595e70e5fae189d02a40969752db51fe. 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/ZAUM71400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bd37e7c390c0aebd4f6692017cc892d9c67eb8291fc6efc2c7f88e468a6f2d. 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/QM4TX2559194.