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 0xdff8bbb7d17a39058a682f8bfc6977419cafcc97f109ce58d7b33f52c7d63ee2. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0ef932c-c8e3-4379-ab60-96de7ba3b5a1.json and https://artists.proofprofile.net/proofs/artist/e0ef932c-c8e3-4379-ab60-96de7ba3b5a1.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 0x120416acee5565faa03e5edb2351700b2015e9eca437aec6800ac8ea0a99d039. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:56:27Z), 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/QZTBF2589580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85ac3eb989961809e15ea0bb312c544801dde6ce78f99f964c2bac81ac69e44. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:43Z), 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/QZTBF2589581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f87ab0a964c8dcb9417a19942539dbd8871acb78a0a424d01b076588d431ad. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTBF2589583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e29978de912f50419cb4cfac0ae6297caaee13d3294ec62db53125d75f032bf. 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/QZTBF2589584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82d7516446227e32e4729ffc4eaa465b729c6e2b37302395a75e7f72e6367e7. 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/QZTBF2589586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25129ae9b3ca8f33d6b87c124ff9eb78827fc0a80cee535713541f28e9356ddf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:54Z), 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/QZTBF2589590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29f9a2e930c3fe8ed6539fa6aac29c42407a034202a16f53aa3d2affa6a588e. 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/USCGH2479871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a592605af574399f2ab6ca2a875f11f45af9f5e68948e30256fe8746abbfc. 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/QZWFK2403099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c54adbb9fcd86b0c14b8cd897f9aa764b538d19d03f5b1ba9d4d2f29495f4b1. 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/QZWFK2403109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafabb0827ee7892e3a4538942aeb96a640a15fcaeb2890e7b28d72fbb2d4a20. 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/QZTBF2449706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce24f7165a089a285c08b8bad7042d426e5d32ab34fecd7e9c991ebdb763a413. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA52316905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f40db6ee776403708fd429dd0373481abfcc25b9a99b4c5e5f43c0f634a9da. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTAY2231395.
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 0x47c55607839a63c19238ce378bfd5ed685dc01019c1acfb5f131bf7b4bcbc5d5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZFYY2423321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1370e80c5b3dec7b1904182cf5349974509bbb289c0ea546a75abeb611322051. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZTB42215376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cc0b5925fcbf9ba20fe15f11a32129c1cd8543dd82e475c95452c39c669b19. 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/GBWUL2394683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad34572bf42b889626a26148632c9a9839fe05a7bf6bffcda168f7751aa14ac1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBWUL2394686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c0604ad06692d064a5df82ca7f78a55cc348b06500f26ad9153b07e920d99d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZWFK2403113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb0535d5b20906111a84c1e5f7c991aef7c7b388ca683182e1d3690a8ea4b46. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZWFK2403115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed547102b843857d111963605607c6a9c1fb98b6f06eac63c0444f740ee0c6b7. 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/QZWFK2403118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0f7b03d1952bffa7f08ed0e122792891a40daecf6980c387ad7dc2f6f1e796. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZMEQ2206439.