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 0x9271ab1b3577d6b93633e1afee0a3cd7833a20de2fe43494a484806a51019e87. 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/1ebdd32c-4c49-463d-b8dd-4c5c15de0e8a.json and https://artists.proofprofile.net/proofs/artist/1ebdd32c-4c49-463d-b8dd-4c5c15de0e8a.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 0xe5aa7348d2b9cad55351dfc54037eb1b8a9d982edd77be68a46a6b8ea4dd85cf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RSA221832572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569b7133e6882f042087057da6a0f21ae3c97f93a4e9cc91e23203f5e8d14abe. 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/RSA221832573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38612c4191f8ebbd6daed1d02b0bc0ebf90b6f3f9d07bb7ed66c2d8572ea647e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RSA221832574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf55f5f61414061d8c1b4aba8d064012b908a816011083d0ebfcf5c8b3dd100a. 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/RSA291903383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147f4c5ef1cc2240c1484893663d169a4fc958cf9c9d4cb8ae57446a10dfda06. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RSA291800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8356bbc1eb980c4ad8b310d17acb13be5981c087ca300bd40badc41013afa911. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:56:16Z), 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/RSA291800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa787f55acfb9b955f19568359520516a844c82601f42a629bfe408fcb875e926. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RSA291903386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689829cf3106ac19fc0b4b81ff05af819e9c2e8320744b17300cd0c948576a0e. 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/RSA221832839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03654031850f5e4ab4a2e81617b0031fa55d12e9638a650d778f89cd4eb3ea04. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RSA221832840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8babcf1bc48ca4d4f1be0294dc83a91e349336978c47ec8f810c5aee465f2e95. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:15Z), 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/RSA221832846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4751a471d1912873e0f0c990bee53a0a879d726f6532f7832b94454a8b96a5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RSA221832848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef3099e7d030490faba6c3cbcdb9de5ce13bfd0c11f5a9cf86b52e0b489e65a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RSA221832849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81e70730eedae3a1e212db28cae44665d335a938da699b3eb240d7351df542. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:21:18Z), 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/RSA221832850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c93927dc355cfaab7340596a1cdbc6b2df0b73ab7d1d073f133f2b0a7b9cba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RSA221832851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a146f1748f94b133a38b96b314dd683a8aa37fa90a71ef06a17a84689415f15. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:21:10Z), 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/RSA221834693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0f4aac2a14a2bc597829f39af336ca43dea2326b2868191c45fc518b6e7453. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:36Z), 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/RSA221834703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb390ef584faba21189e4c2ef71cf298c664f6250f91d92b51beeb9852439d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BAA052226062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab3be28a5b48dfeeb3ec0668b8a4381074f4b33ba0f45510d8c9a8dcdf073d6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BAA052226069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd18b4cf508d1d3629efbd5df75efdcdf69f8ad92fee2b001232cc87936ce7d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:16Z), 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/BAA052226060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32f0107017a3a4b31bb8ef93810e7d1d74eb955169ab6b7b42633b200bd4120. 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/BAA052226065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513f52f324a48fccdab9cbdc5285e32ab8453641587bdd278f85a410de49085. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:21Z), 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/BAA052226874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d87d5d0cef9e4057c48cde320f9964af3672de6d2e3fcc08b8da0310050892a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RSA291800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee7c7b96b479977a6ce64b0807800bce08252e4cef428b90a7e160aad55021. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RSA291700438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581ebe5251cef91b201e99bcb7841bb2d8590098e0c4839dae0b2a7e564b91f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RSA291700927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd255a6c2b353a235f06ee34d7c348d4c64c860ffbb96abe2be3fc00498da2fce. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:06Z), 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/RSA291500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb806d2040ed998e010272ee356224d365d16efe081132ac1c6c5474bec561800. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BAA052340778.