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 0x2c5689ff2f0befa1609fff6232ff0d27509cf614ccd8f3e0a6bdaa3102bfc8f9. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dc56fb2-c096-43f8-9fbd-cc8c5c3f5b09.json and https://artists.proofprofile.net/proofs/artist/7dc56fb2-c096-43f8-9fbd-cc8c5c3f5b09.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 0xa36114d563eb4238578432252a2e7f745b275e9b48699eefab9ea85e787078b1. 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/USMH92305725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114392c3abc33cef3d3316db92d94deff5e190a102f6acc7f2568e196e4f9fbc. 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/USMH92305727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbb4bf3809c7deb2260f71bc3c477347981308ad3f312035b0acbe9bc63612c. 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/USMH92305724.
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 0x0552831e923726c6036d901e8a932054e9d734030e469fa233efc36ec6073690. 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/USHM82330304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8de9f1c19cc364aaeeadf1e6dba6849f5d1d889e263a9e999dcb1be2c56d5b9. 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/USHM82330305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70059e603971e17c2cc3ffd9d18c0129213cec49b95eb97427d123d57d4457b4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM82330307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c60a221e928c212ce99f3ff918a7a641c917f0a3477959923510530d2018b69. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM82330311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89203d2898c9fa736238718ea62d4c027210d0f986befe127b158e38b6b2f77e. 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/USHM82330313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa129257f9acd7322bc4db99c562884afd5e0d373dd9c774e0fd09bea9bd6be69. 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/USHM82330314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00d254542c79fbc777a8acd82ef2ede33ee71e4aa7101f75d4507a7daf759d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82330316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a099cd4aa0dd18c8b99996c4c7fde3df9c1392396918d834334252851a62158. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM82330306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155619828bac6c7de6610173ae14e39264bd3c1a4c5c2e72ef245b34f0a772d7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM82330308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0deee27d0dd4458e017a0c59d00fc0e58b77ae81acbda45c0a6abcf37c5e455. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM82330309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348e8efbad084d6f3ba79a571c70a64e8925fc4bed03c0d5dcdcd2ff4fa88975. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM82330310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f23dff21e189c8f150edb68122096988ccf046e925d15f8bad89f142c81a45. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM82330315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7fe69d30b5228c66628e396ae15f59ec5ee0f8836bf6fc015fdbb050fb3430. 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/USCGJ2495149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159843d4ac0ae0f73e1f9f8cc1348859eff351dc02e1c24b6566ab1855dd27a2. 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/USHM22353976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6102bdadfd54ccbdb947fb2d677c00328222e8979a79572c0ddaa00d3b3749. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM22308545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c08648a592fab2e2be2219a5cb1048ea1b1d626fcf383cc379d190100bbcb8. 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/USCGJ2359906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b6654fc5083ff2e63bd24b6278cccf84a676577fa046ba4a1457663c7040a2. 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/USL4R2239945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52653ffe2017a10d7a6e4ea434785e67c0034086f73c535b38905590d716fb0b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2361842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0569b59bd2f3a3e50e273116f4c0b62a4494ef691c6e021ada2eeaf28dcc15c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4R2239851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ff3402aa6999c6ec91f098daa3bcf4640f9995041a4610995e85d1051e656. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2245748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe959302dfe15bda63be7889567e1a3e4b6b69560e8c744152caba87fd708bc77. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q2481699.