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 0x895e579ed6185fd5bd3f620328398904bdafa132a16f520ed2c767b678d0cc26. 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/751e39a2-66ac-4c51-b7c2-7e100cf1ebf8.json and https://artists.proofprofile.net/proofs/artist/751e39a2-66ac-4c51-b7c2-7e100cf1ebf8.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 0xc1d95a4fb242053938761bd9566cd24e636148880de0f8360fb15e301319bfe3. 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/NLCK42225287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc57e1d68fe44c1038aa5c146fa5b11cfd559abd9ee92480bdd04d04d29227c0. 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/NLCK42225288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57417f28adc13e6e043279c8ab8182a8ffd1a8f3585550067ed43c5e9820f89c. 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/USA2P1843097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a71ef6205697a947f6fb6f1b06540e26edbe02e572b29993ecab3fcac306aae. 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/NLCK41055788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219c977d85b80b3d3c1c323dd29593665d2512fe4b713dc53cd674da5045bdf0. 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/USA2P1863071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe47d8e5d068f4235774d7ed079b94612b2ce3890d3bac1b75ae52e2f339ecd. 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/NLCK41054050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397a73e456376e78da068fef3c20aad408a42fc8cc290ce1c5fa04bef37a3e2d. 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/NLCK41055791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a30d6fa40e5cfc16f6472af57faeb37d4b6e25930db708bb29a4ebef28235e. 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/USA2P1820775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d47cc696fa6c3584dfbd1c1c5d90347cdc79490ad22d72059aeb3d0b9aa17f9. 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/NLCK41055792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14223bd12f448cea4ad043c00daa19ddc1b1dd856b6a974639056ababff70ac5. 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/NLCK41052364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd75af591ff8e161daab4e6db9688918afc85fbd62cd4b7abdb7036fea0844a5. 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/NLCK41055793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79d05ac011df1c15e49d6d112717cd77ac2ab87fa63606c9abf7f14c668a071. 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/NLCK41055797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe277dbcc4e03734d5507b0acc4e7f7fe9fccc898facd1ca6720e50ed46dda932. 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/USA2P1384005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd04a63135b277749a11f20186448ed163931a8d16d9a618cc35771faa90dd34. 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/USA2P1384007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b5db3b77b9a3fc776d223e7cf71f352a741ab8aac7b94e2ec06ad3bff214f. 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/USA2P1384008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcedd55f0db2bbb9428ae5e0bc0d7240705c8eec2bd8e56073f9067c14e80b7a. 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/USA2P1384009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399ef5fb5cb38aae158627d98787b94d928e35d71c441043501ec57fdaab87cd. 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/NLCK42402774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91bdf456e4231deae358ebc0571ffe24da8196906952cf8cbd79a10fccd432. 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/DGA0P2306252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999c42634060b1353b3fe43f6b8876a284d79e1e6442bd17e126836a02bf106. 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/NLCK42237064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8d2560919cdea2d8fb0883ca778fed7cc514e5df70f2a5f3280ae076b98cfd. 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/GBTMZ2301192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ce83501f415ee4ae70b64415f43eb0b3d6dded65ab8b578abd81c5ab6a7fe7. 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/NLCK42225291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fc5f19bb5b4b253247ddde57ba647cf53f10cf8f77b910928df951fa339a54. 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/NLCK42225295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eb1c77544591f3755f3d9d176a5ab384c379a9c390a46384e89d083900a0a2. 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/NLCK42225289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9848e61567f831beefc0bc3a6d020fddc67fd67d43f6c21cd82230da328e2017. 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/NLCK42225292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0a37e6aa3a4d70123a5160aaf21d395bfea7117438adfdbb7f1472d63875fc. 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/NLCK42225293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a910b68399537925bd9839d9614b393e38e40ad1851cd25dfaa04c66c468ab. 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/NLCK42225286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030917212e537b18f978a93c2e67ebe672f6ce87ed7cd5856371dbebf0d8660d. 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/NLCK42224285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe329b896e62d63ac65323e23c31d3f83787f67d6be05b33266f26bcc8e3daf54. 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/QM5LC2200486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d81f260dca74d3814efc52b83e596a82f47ea3e0fbd7c95f7ca01959f3b0af. 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/QM5LC2200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b5e774f66c59b47bd753d53a3bbe85ac74610d348d68d37d7b2696d1dd3e7. 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/QM5LC2200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d81f260dca74d3814efc52b83e596a82f47ea3e0fbd7c95f7ca01959f3b0af. 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/QM5LC2200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec89b13361aacc2db06dfa5acac98358e3c6d31f9edd24e2daa26127bca16b6. 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/GB8KE2208068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b5e774f66c59b47bd753d53a3bbe85ac74610d348d68d37d7b2696d1dd3e7. 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/QM5LC2200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc696b7f10c251af9324657f10751e7796e7e10e4da13a5f958c362d5ffe7e468. 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/NLCK42213150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de91d34a8ff0db4fa5340c1ce0ac3565ef5d09f5805999a9d6914020ff27a64. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2159468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cd3dea455afde55588cad2535df8dbbb5987e728de90350e6daf2368ee4c16. 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/GB8KE2159467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de91d34a8ff0db4fa5340c1ce0ac3565ef5d09f5805999a9d6914020ff27a64. 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/GB8KE2159468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee7c36b2590edfe87dccf0c94f59d696afc24c6ee7df4c470c7ceaa9bc01b53. 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/NLCK41071341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f414dec68664ce8b7dd58b9a6dc8e46ef562865e70c310ce2a542db735e88c. 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/NLCK41071342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52a0b37d62b23558b5e7a5c2f1384acc52137940566805176be9cca3173840b. 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/GB8KE2051142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe47d8e5d068f4235774d7ed079b94612b2ce3890d3bac1b75ae52e2f339ecd. 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/NLCK41054050.