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 0xa1b8d2280b4ce272e9eb3aedc0785083bbe3ce32c219d748045732af687755e7. 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/00176add-d759-453a-ab8f-1406e72a7a63.json and https://artists.proofprofile.net/proofs/artist/00176add-d759-453a-ab8f-1406e72a7a63.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 0x2b2b8d481fbe0540398175c3245a038fd5ebc66136186a69ae6f7a12db6ff855. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:23Z), 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/QZ5FN1771160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed1aa62e244ab6666f1272ed8e26fe33efcc8362592d35a685302be5f8d9c7. 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/QZ5FN1801980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90737fd1acc0dbbdcdaea98ce9032502a811f040e5d9a5d106a61dabc3371b7. 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/QZDA51977641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1598123ad2d80499797237560626816cdc5d5681489fc50e214b9abea9291e1a. 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/QZFZ31981759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc387378891fc2399fd40dec541aeb361884d3d9bc647d93ccc20b3569279679f. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GBLV62040594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd118730b3491f0a21004e678b854af05a0afd7eb3e3b5f4c39b451bcb90c450. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/NL1LE2202788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29db34c566320d0bb2a538d9c1eb93b7895a7a3f9c3f978bcb6ba9bd241efc5. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/NL1LE2202789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78c22b07d23526c7f42087a51c3704cf07788d55fefc7ae36c2d5f1717f345d. 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/NL1LE2202790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f35ebdc024a11656ba7279f9c97e73915ae9abdacafa875f38a8aea793220. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/NL1LE2202791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4447404fd1ab8597eaeb10edb8f68b401e99dfcea49ce6e38edb016e72cfa. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/NL1LE2202792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a306fa271ba4790983ac372d6328e4246f860aa2b39befd08073a469c966a94. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL1LE2202793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4febe9da3da85a78bc2a772090fba8431f75fa4c7efde23ce82e5651de018. 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/NL1LE2202794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3580e12ee7cb404372cd04156ef08d149b6a35fabc5e2c03ed86fd917c0c9f. 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/NL1LE2302985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361c0ee1ef7f376571e480b9aa7b5ef5e0b8851992022caf9319637ee45d00be. 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/NL1LE2503708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5aecbf6a67d7d64e6da93609fd834477f65bf93af1fd15d2a3240a0a8d834f. 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/NL1LE2202688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3580e12ee7cb404372cd04156ef08d149b6a35fabc5e2c03ed86fd917c0c9f. 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/NL1LE2302985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc19f8d492372ec42c59eb2f911fe0e9aaab84832c6488909ac3216815a2b65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEN1970831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689302ef4331299ac81c9b9e9c6d3a4e43f6d025ac461158fb186042beba900a. 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/NL1LE2403520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2504aff2932800f7fd8475b52b7c3abc9081509457ba7ada7da8d7574f8c5adc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2094064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941acf4d08061b8dba6e3f2c93fa745a1c710ed2efa66261fa65a70eb27e05ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1871806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bad0800241ac97f4ca5a0b21ddb31e45c51ee253d8bee2aab201edf5762b81. 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/NL1LE2403574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361c0ee1ef7f376571e480b9aa7b5ef5e0b8851992022caf9319637ee45d00be. 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/NL1LE2503708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578761c691852caa4fd9b8bf715ec812f23cf39c21a4410ff04dfe864c6bf8f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1LE2403472.