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 0x6a3977bde64a48e321fac1f899e434fc46adcc2154d8383c29821bf1d1736d60. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a857b79a-237b-434f-b96a-a70608f5194e.json and https://artists.proofprofile.net/proofs/artist/a857b79a-237b-434f-b96a-a70608f5194e.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 0x61d5e4b860a2b0e35b5835149dfefb6e064ee45b236d81188514ee42ab238d99. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTVM2493645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d625d091d4c83c6cebfaced7e3f7fa5b99e16fd7414d060e6e83db140a24c. 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/QZTVM2486126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd93fd6d9c377d96d1c0e3ac67630b4a464ea88e3010604322f891b8ffd7a743. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:47Z), 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/QZTVM2486127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9911977aaab1bff16ff6387704174cd44193849991c5025d227f0d4ea5344283. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:44:56Z), 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/QZTVM2486128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8dad75ea713ee56ce6beb53140952ef63f7e51abef16f5cf136760d3624839. 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/QZTVM2486129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea0cdef6f1b2f21a6f8e2d8cb2c7453f2813c62abb7fc22c3f19943aa25fc9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:00Z), 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/QZTVM2486130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887ffab58e990840ff1a3677533fd5e999f4784eec2f7ea1547ee3ba40b6af6f. 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/QZTVM2486131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66337d1ff5d018771b17a39f8f4f88305eb5c65f1e00328cc254bedc89efb13. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:49Z), 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/QZW9K2403492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eba00c658c7e3c1a5579c1dcd5b64680c165cc4f3bd3ad922bfe8a4f2bddb5. 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/QZW9K2412443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6059b6b59c2d844113663ba2e498d72e3cfcd06f918eb93c8a718017ed953f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9K2412447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa684e37958477ca2e1013da3678cf5f10493bfb36076620003e8c27a6f3a2fef. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:20Z), 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/QZW9K2412450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65b09f52c25c14ede1574d1d095cd726e54e87545d1a7f84214fb20ea12ca2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZW9K2412454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdd319b69fc6717985cc01e5af6ce2903b3680f68ae54e541f4855393e2ef66. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:07Z), 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/QZW9K2403486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2d3fc7772b6d495e9d661317872fbe5f16cd9947862fa1fc8746bc88113676. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:25Z), 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/QZW9K2420318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c6a30f47998b0c1ab10d0063fea53a0abb9b0655bea4db6bd6a22b34f11ce2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZW9K2420319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e165ecc11a7e48db4afe807f110bf60f8333a6117252b3fa2af3b05ea1fbcf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZW9K2420320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d99f118c87a63a213a550ed81e1c1dc8e4cfc130cd6ade495bdda1b16935a39. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZW9K2420321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284a6e457b25473604ff548e65d008424b071c50ed77c708278b9af4227af6d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZW9K2420322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d7e5b6137612c7a68382d169e6da210ad63490fbcdf14ba49355b0157f6a2b. 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/QZW9K2420323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b330af7254cffab244fd7ef04b9a1f8b93592aa9ce8c253cf0faaa896695c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:26Z), 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/QZW9K2427334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ad1672d6fbf0701837afd133271180b98a106bdfc67b31fefa2e476d7b83f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:07:30Z), 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/QZW9K2427335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd652fafd45d226946326eddf6ffba06c4d347a9706e724e2893fa939c62dd25b. 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/QZW9K2427336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c599dd9adda54a8e3c34955308920531358f41ed1d39404aa25bcc7eb27cf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZW9K2427337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9411f9f95e59cb3bb504b6fbb34f37e51fa605d4a37fa66b13448899e4e2b9fd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZW9K2426567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e686f826128add2f96692ef12a85f786d00bd404feb99f9afa9b0610de890c0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZW9K2426568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8e70d478f79e2892daaca88b34f9eba1129c6292306cb6d7ed8776d7fad419. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:14Z), 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/QZW9K2426569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a4b71bab94f1deb19ad0da93a25a9ecde3dd29738dcd5b03c6ea36ea7a8e98. 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/QZW9K2426570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b0246eff9ffdd0c5592b29a92662e7c504ded9a7e2e2082c1d9e45513cf509. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZW9L2407450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625ca4efdc60eb6fa699d2ae8cd7d7175ff1bc596333358508345544922db93b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9L2407451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cc460efb8f091a3f23900f1794d89681b349cb4b3737abc15230cba3cbbed6. 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/QZW9L2407402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c5e3324d10192a4748b3b3c964cb91fcbffad78e97fc7aa7cddfca5f6306fa. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZW9L2407403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6499099d0f548be3227e161cee588ce2792b7199088195939e9a6a3140a9a9. 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/QZW9L2407404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89269278d67c7e7118f744b59feafad1c6fb255596a513fd66a55e9d4b2106a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:01Z), 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/QZW9L2407405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8130e4fe9fbbcd1629ed8eb488f6c668747b2b8e4a07b4e0282962ee6c5e45. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZW9L2407406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32ed4b69b37d65751646be68dbc5c114cb03204813e80cbd96859581febcf15. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:31Z), 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/QZW9L2407407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563c8f05a527660c80338c79b0bcef2ebd682086e9a3031f7d7989b107b5b04e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:21Z), 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/QZW9L2452690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796e273b79a249fc46bb93740bd960198ce2618bd4b88b6409e37cd0aab035f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:33Z), 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/QZW9L2463949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5bcd85d2e09abe1e28fdce9a6163d08f8f395822aa121fe01320bd16780bf4. 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/QZW9L2463950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ac1747c53b99c8236a71a44f520fd7087f26693fbb392389dd80f55c69d812. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:20Z), 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/QZW9L2463951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758fab5058f0b4defc8e0fd756e0eb7892406b2657733dba52287b280cf6cc79. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:36:49Z), 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/QZW9L2463952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d277ceb556f131a8122fc5093ed0b76b3dfc69a8160cb344d4a9857018e300. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:58Z), 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/QZW9L2463953.