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 0xadf8538d6c1e23f75e20aaa96b1f098280f605f32239c86cf68d8f3b711a0e93. 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/c7d0b191-2d6c-4d6a-a809-d61fff58820c.json and https://artists.proofprofile.net/proofs/artist/c7d0b191-2d6c-4d6a-a809-d61fff58820c.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 0x63d9b310650d0331b95df73e4692bff19e09bae9015446367f5073da642e8b36. 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/QZN882231756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ae36afbc1342d57e367bfba5f3318ed264ae9097326da8337b731a74a6bfcc. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:50:39Z), 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/QZN882235684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcd881178ef3cf516bb29a938bbc4a0d46364d733e5d2326cd2c36f93d7331c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:33Z), 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/QZN882237584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009e75ee37e00fe99aa173766ac9adbaa9aeaa27ad2dca5c27289919a58c41ec. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZN882246126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7110041c5fc522a4e022df7166d2bd57e1e0c38f673fd84063cf13864175ad. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZN882250594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabee488211fe2ab0f65022690f1265ceb166062b1a4f3f75ebd8c29b14e7375. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:53Z), 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/QZN882330372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361e296a049ffbbfc7b78d5ac585d7a6902d6a47992225171081de720e780d99. 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/QZWDW2410011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33675a9958bb60b7316528040a18b7ccdc085b546d5fea8fcc86cab8f963c90. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZN882425230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb115813083c107710845e94f8c05d4a3d1ddae856aa7be46416e9578312a73. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:18Z), 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/QZN882437163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2de221e876393889eb1798ed82cf566c390ed80ab8e0f5df320f9726b9a81c2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:20Z), 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/QZN882501164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3277179eeaf66bc71ce176e23e204c4babe2c265ce655fc850beb780ff2eb545. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:17Z), 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/QZN882532525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b581482ba33e807551177524401383535e77bde53397430b0bd7bd24e8236ac. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZN882567183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5af8f5812b430a9b91862196b87ac91689999020f42a823996afd8d87953ac. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:12Z), 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/QZN882580299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49b1c84238438c748a5132e1c8031247b002948bd8b119ed151029bade21946. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWDW2524917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7896b4166b6422e81dbc3712647a0b99e271e81352055570441d77dcdbd6331c. 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/QZWDW2546438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d867caf0e524bcff347d191306b8f353018b6f2a07cff5bf24141780b5d7be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZYFZ2517518.