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 0xcdb4e09161a4f90c4c5eb8c298260bda15fe244778091094e1dd51b4c7d31ded. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08bf1ec7-d844-4654-9b00-f15aa17b72de.json and https://artists.proofprofile.net/proofs/artist/08bf1ec7-d844-4654-9b00-f15aa17b72de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0dd3c56f3c4fbd15862a6b8f4cc789b87b93ba1062522c908a0106fe893b9212. 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/TCABQ1341228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18521b6ade17e0a08d68f97eb538971ff24c575da30f6afca393f9c34312c7a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABQ1342179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b06fa6f216447a69df399d970b11ce64b97b5d660b909c052c2dc9b2090ae6. 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/TCABQ1342198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111120128afd8c0b6999166d49639e6b44773259ef40a60245abbc4898147b6. 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/TCABQ1342200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df8f49f880247d1e62b92cb14394bfb094927dcd9c60748f49b573383449df0. 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/TCABQ1342178.
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 0xd4a0b3600c66fc69ce98b2e8d98b99d8e9adc5abd8b948f973c71d5c6fd74614. 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/TCABQ1342182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be04110775f02c2b7f2f5427154f79ab40615acd3886bc56e9443488e3b2f55. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCABQ1342190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44325f698aaed0998401f8ba553f01e7de58ce63bbb2dfde8f3cf4bdfbee65d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCABQ1342191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f1cdaa31e2a47c69e61ac18941e2fa72e06b78953953dadbacc313f3a51e57. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TCABQ1342199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce7d593dcb00b900bf593025782cd995f958a443f6f5f999c0c7ad07c96138c. 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/TCABQ1342279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcda2ee6f05ce835dd38dbd9377b4901dae1b6ee495374ca2614febad6652d7. 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/TCABQ1342285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e372ac8b159b6daa9165387a4358878de3c688d8f94e571fa5d7fa40367ddc. 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/TCABQ1342299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c83af89519532cabe0eb1fbe79085ab6f9b5d9c700de9626fbc934348695fc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCABQ1342301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42484c59738bdbbe52f0309446f8b7d0f73effe335c5b3d35ff728656e314d4e. 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/TCABQ1342306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1effd95abfff93a37c6d724b66a98fbae9d3e3b7ec551a27fdb594fe763e6f77. 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/TCABQ1342308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da439aef9cbff38b00d9f6fff53fddcaf3391d65a12cb3f8f2185a3837d218. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCABQ1342284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe086cccbfdfcee58586e36eeb7daf081d34a56a70e2c26f4e3c4615252e64e7b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCABQ1342290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13906b8420b515c5710e4fc065ac083b9c24d002d6d6ddfa10a8762860a649fc. 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/TCABQ1342296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd853c5d4f7fce35bc8e3e0a936eb7460b144001f609b46b9f6839b5cbaf4cad8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCABQ1342297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6815b9da6e67195c2b13fea9ca66875dd2dea0b1e4aaa85c11785a705ca7110e. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TCABQ1342307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7502a2100771a4fc4bd451a97160897e33cf46082ccd1a915bb6450758e625. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1101056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65983974dac7e05fe206dbea4e3e930418fd57d55558fca68d965215fe3ccbfa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7SR1400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95255b681dcb92c072db8a604727e0b3acebcb5438e34c23f7a4ba46fdfd3318. 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/USUYG1101083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bfae378f2cfc66b2e8fb542cea80b356be43d5eea54185f88952a96ab9b338. 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/USUYG1101085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f95dc9498f3d38778a5efdc873c1d08f731c4ef839d7467a3e45ab0f65dbfb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:55Z), 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/QM24S2303880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae6f4bd5e03d28063db2d3064503db69e2820a0f657aa36523b85c40c7ba7b1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:25Z), 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/QM24S2303877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf2d59f4e9c8a4598ba607e5ff59a5191dc2566b7fe5b46426fd1ad216262a5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USUYG1101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48383db0c569b9dcc709449e8c89a7043fe411ace8766d08b620caa33c00f2ed. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USAE81402325.