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 0xf58b16e1b12c54377c348d64bc00fc4249aea4ab5d96df5302d2a2bfb6bcca55. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a82f798-5da3-4ca2-81c0-031690acdd4c.json and https://artists.proofprofile.net/proofs/artist/5a82f798-5da3-4ca2-81c0-031690acdd4c.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 0x5a884edcbc0003791e23f25c34662e2a61e1197ce2a1bb5fa419c6fb13a3399c. 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/TCADD1758136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f29abcfbc0164b36eef6fd3b308347b34a0eee0e8c92b91801083cd608ca53. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLB8R1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f8fb36164a9af4cc07e0e5962c7b415c7f869df691c71c374724671785baf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLB8R1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc5cdea6b8a20981475a3851bbdf96f896ef4059cf5256a9779b9c8b4b690f8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLB8R2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5af8b17818dfbc11e54aec55e3b26918d9058d65c8fbc86189e097abb39fcf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLB8R2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eed41e6054cf468d9bb5f9c73a662c6987f5f5af01147803d99e285a0bc20d7. 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/NLB8R1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290dd329b6ab6f312730a679b6e986be6dbdcb579c7aeec7a343857ae7f294ba. 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/NLB8R2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aeed7f69608a32a1e6045295bd8ab704f60dcf9fde580b626385b7fc69c3e1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLB8R2000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe76e5a259ba6def61b6f773109dbde7ec7d2da27c56affcba92e5057c00e0b. 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/NLB8R2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0dd7b7e272c4605015994b16c02923b148faf47a30fa0f8d12d9a6d38bafa7. 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/NLB8R2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa48bac2f53db18703f8eec2cfc5a4c428c5250e5af8f272c6b6da448b6eab8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAX2212134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf99de5376c86a00b78a44de8d7c0c47937664bac55ac30f276633edbe79d140. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAX2212136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152013f8ad814f44e2d2815597691df2292768da5e53513c9da6fd01f76d5c3. 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/QZTB22268117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94f977875b996272c90459d7b980af9863507e938ed9d11f0f769ddcced4bf8. 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/TCAGL2288898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad34ca6eae3265a17e6447cf615141a00febc0d6221624d245424d54089709. 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/QZTAY2274975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf9932d23f30baa843bdc77660ad4b9c449bb64ad7b310ed5080e6ed6bdb09. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZTAX2212135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99e1f66eb76419bd11ec46f8e9a7c255480fd1d62e1b0d436bdbe6cdb732dfe. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTAX2212137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d88cb8763f3ee6847ded429f4035ef761dd2c3161379cfc6d819aa416d6e682. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAGN2243406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b448c6d40018e626778bbdb5a858af48daa821c8cb2f885aa32239efa6685c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTAX2212139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df31f4a8526c8f8f4e0ef40e5cae2977cbd6806ed9a835681e7e17b8e346749. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHC2325074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec7be22cf13c6e485a6a0bee2efed43d81e2ebaacc6a5ca9e41b718632f3a1c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHL2364606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88f26cff38fbe27e2b10ceedfd4efe19db3ade4ef62fb8b7f0859c0b181e994. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHY2434592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ed249989b93d73d74d0934563d3b5641b1e5cedc03f4235e84a7d082afcec7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL3GQ2100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a0dc459673d334a9610a419bf7f8b355d8b8925ed90bf96806835beb603e01. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL3GQ2100675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a0dc459673d334a9610a419bf7f8b355d8b8925ed90bf96806835beb603e01. 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/NL3GQ2100675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7662fc76cf753946e87b091e2f9c782c5510f465d1a3d04b6afbcab7cceceaee. 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/NL3GQ2100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ed249989b93d73d74d0934563d3b5641b1e5cedc03f4235e84a7d082afcec7. 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/NL3GQ2100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b811c9d2e523a3ac4862b7dd1be543d2f49e300134c0e3958f18d49987be749. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL3GQ2100693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f54b721e53a1d30137c091c6ce78d27926c25554e464471682466a9bef488. 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/NL3GQ2100598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35366b5b12712847e8d7e56f3ebd2acc3add006fad4ada43447758fe136efa86. 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/NL3AA2450029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35366b5b12712847e8d7e56f3ebd2acc3add006fad4ada43447758fe136efa86. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NL3AA2450029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490b41b35fba640bc50c426cc2babb2f1931980fb6f34a714dd7c97e00148d18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2422222.