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 0x14e934a79123d3f2eed2e6a46a6f083c27b7e30c9afdfa3833027eb5de0f6ad1. 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/8c1373e7-bd17-45ed-b003-7895d281ebb1.json and https://artists.proofprofile.net/proofs/artist/8c1373e7-bd17-45ed-b003-7895d281ebb1.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 0xb1d5422f0d2e26affbf9995c8a94d781e17885dcbc46cb5dcca199cad3e850f5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZES52272884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf809dc4a26ced02946366648efe14b848ed125173ec1cedf8d7da1f7804b883a. Chain 2 (Bitcoin): anchored in block 959363 (2026-07-24T04:14:27Z), 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/QZHNC2261313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5aaab57abf00e264152a9737455ad5711512d79e664d120101dc6cefdb348. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZPLR2290431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559ad4c546a172cfec3ac5547ee82b9ab4cc82e9ef02d64e24ee9cd74c99de36. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTB82483551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436b39cb9446fc0108ee51825fe4d11253af866235f155272100fd3fe8dd7d0d. 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/QZTB82483552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46c8efc6ce1812942cabc3ad03d5d9dcdaf89250b2db3ef90081f1f5b66583e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB82483553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6b22fc02f7f462a0c2eb0820b3953e530bc2f262031b433f35964bfac92d9a. 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/QZTB82483554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acdc2d0fc6642bf10b6cb9930fe7d2dafe19387286d4b28a0b82a4590b0f0e5. 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/QZTB82483555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c093dcae05dccfcba71f0716ae375532a84a944a6d5e8d0ea31bfcc933ce34d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB82483556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b225ed869797050c9fdb89d071d447b695955a0781d8cbc91ce5e125cdd1fc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTB82483557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a5f0433ca6a8a0e66181ccb9f8fa2fc4e58d51f4dff77e213d8b0dd64ea5ef. 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/QZTB82483558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc523965fce867edddc23b3dfa916910e86370c6b94d30cdac42111a92b458. 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/QZTB82483559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fdfbdc24c4e3599289837d9bc6510cd2d1e609b67f69514d022179ad7713d8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB82483560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1a346415d77d19c3b08474d42ea36220d9b83cca089927471491be6715196. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB82483561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81629a1d7772c73e010a2dd278fbeded0debccaf98fa8e66e351f889c748150c. 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/QZTB82483562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893d116ed3d3854ddcda59ae3a8773e20aaeba45160775e4ed820fe6f386eab8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7Q2426413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50547fc61a5b5eda78ef07f8e87b0a1c3a1fc4b9e52ab56dfa144167d1405c9b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7T2469037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6786988f1b6f855ce808b272982642a64d73149f4b32fb617d7ce6fae4aff0b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7T2469038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624cbc2f021781dea465916ea5bcf1708f14d37e6269198ab0b5c9f51830f53f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ7T2469039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf619b44631c7efe07efc4fbeb1467a1aa286f8beb1d4c93c004fa453fca34c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFS2441380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1617fb4d0eb4c3741a3e05bfbe1f28c264ce58f816e94eaa3e389427285d247f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZZ7T2469041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6270979e3fc4495162da2d1a1b4ad314498e46e23fa6a72615333f430bcc33. 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/QZZ7T2469042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c68bf7f96f200a144af974162d8d1f076de8f8bf82af0be9ad87489053ef26a. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZZ7T2469045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7def2203f53f37e63a0f0ffaf9bac8ac82ab7e53a4e1756be69628b96f24f9. 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/QZZ7T2469047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243bee0aff05dd0c211ac304c28118f8ab7fa2c283b8871d2f8f781a4cb5bbc3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ772439743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669017fdbaa258b750c9f50134cbbf7c11add357356ca08b07145d44fe0ca87a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZ7T2469048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ab18e431900bf07e4bc5d346d0db5d5a2c671cb70d6887b8045fe03e6c25bd. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZZ7T2469049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a6889f086244d94e902901fc382af255dfe561a40f05205cfc25821079ee7c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7T2469051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490852a5e087e9128a8095ecd58e885e0cbbb08c398dcbf3ab8168706dbdf3a. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZZ7T2469052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23556a29b08139aac82e69acb7a36d431f85820e2b1ee04022d45d33359af75e. 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/QZZ7T2469053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caba63d2f46776e1ce0735061764db8e7701f18849882564a2cb5075246d276. 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/QZZ7T2469054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf064cfc27d2d3933834794a993172bebeea98dc6950e1654d66adfebc64248d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ7M2477864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c549b3bbf0e1df7091203e3b8f13c8fb77d98330ef034483718652e60571cb8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZZ7T2469055.