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 0x96a142dfe8e3facf098c2a4a2b7b236d67d69b28a3828b6360d62277417b1588. 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/32750d6c-ec6d-4d86-ab7f-9fc619b0d280.json and https://artists.proofprofile.net/proofs/artist/32750d6c-ec6d-4d86-ab7f-9fc619b0d280.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 0x0fafd61d7586cc6497a0c56bd7c88ffd4700d2ec917dc75a6fffc3437ef996a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLC061908851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208adf4b90bc0f70ab8c628d187400ea8a86ae64167f62c5566f42083eaa4a41. 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/PLC061908852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae125e0829ac147fe1c125d9ced4f6ee02216b57ade5601dd1c38a26ae154a0. 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/PLC061908853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c09f8b9a36baed01720c1a3a8035962dc66cc3c9f72b5afb33f51d3c233374. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLC061908854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60befd2bcd4734c94757954dc20532e2167e63650ff760726c1849f24b0d6ff. 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/PLC061908855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc990576a240fd587bc016b738563eee149d8d3737c54ee86d25f4d3b8fd8b1ce. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:17Z), 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/PLC062009082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa914f89f1462779ff1ef86865271670bcef0bee9bf9fd38998119b3791eb32c4. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/UST8K1809730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdb974c8c2f2af658596a7b3cb908e62a1a1e14bf0c601ba2bc647804e3fc46. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZDA51964245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80838d5cb09926e6caf48ae9f7f32d1e4745466533e692d94ea628128f385258. 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/QZES81968652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b394a00c49b021272ba3c6f6f0ac23f6811e036d1296ffb80247f1768fccb8. 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/PLC062009449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7fbdde2006eec70a31b3027fbf380203032ebf0502bb73d506489bdfeaa50. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/PLC062009451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b8eb9aff0c985b2542235498a7cf1ad07cedb3e2bdef0c79a8a9e39863d42f. 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/PLC062009452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e03170b0c697f6133ba6acb3885eab3e022d889e3793595d8b1f20b1da4a3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:56Z), 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/PLC062114164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97794b2c266204f79735c5ebdbb4923d86b62465b901de06e9f8316876812973. 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/PLC062114689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c4e8be8f237b232565d9d547b80bc434c4c66000c5418593a57bd8f18d34cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLC062115005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea43730876c8338ba8fdb8390865ad4622941da9a40d1df951c50867ec1c18. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLC062113817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab22218e974050e83a8f342f042674c3e0bff436657661c8f2ce149ab71f7277. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:24Z), 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/PLC062115007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcacde9ebc08fea50be40f27ee57f4ea074c6c1301b3929182c8b86877f4bfb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLC062118025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef14273face31a6b3a95c123da86cc17affdf013528bf9af480bc3b4ba94a439. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:26Z), 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/PLC062253160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0c79f24833bb31a96f3dbfb5ebf6b1be05c8c7dbb33a2285ee3d473203b807. 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/PLC062253819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a703bb6c4f74661924fd07d4a39f9726d2d32c655efaea6f59c6c61a4eaf255. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTBA2246712.