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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a6be1197d0113535ceecdfb4c2d729a8dc894637109274a55c84a213cf6a1. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2096aac8-7cca-4078-a958-d252e1a258b2.json and https://artists.proofprofile.net/proofs/artist/2096aac8-7cca-4078-a958-d252e1a258b2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56379b86953d493970d9e1b700561f4fcf2381dde6ace52e9276b5573e2a3012. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXHG92516744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0ec6707745e69a6caa1c2c72788cb3d67a2ca6e2a4b32d3dc672f15980907c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXHG92516760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd7739dea112a1d1378cbfc3f34e2aa3e6e1e4c1a3e7d36e80c559ee4bae9f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXHG92516761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f1250657c76b01d1fc677fdae6ab44d7d5ca0f4f7696794f96ce7631e9daf2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXHND2519039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756cb08402eb1f636e2cb4c662afce7f532e6d40608b78ed843cbb3d401c2837. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GXHND2519026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab1656e4e92ca6e635fced322c1ee221ed85c1a8117975acdd89d7b469f12bd. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/GXHND2519043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e38d29387425a138945146fc2877378d7e04c6a47b7e063cc858ee21b7d773. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXHND2519037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec06382b69769de356b4307a978a505680229af08fc3cc349c891d43731339d7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHND2519032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80baeb76945a1a2e16336f147c69be36725cd3cba01d763b822d1fd18153bc8a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GXHND2519023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde79cf051c95fb6940fc7baa9ed40733d35945b5dfcf3dd58265fa9bb0692283. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GXHND2519029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31416e7de42a88f96b165a8decc3425c71a80e65ff600ecdefad42ec2172be63. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXHND2519025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec028df30a8aff3ffd16864c38480025a342172a02530fe2d4456813d576f819. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GXHND2519040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09ec4687b784fa978f92f91ca44a33e7fd4ff8ee7c20233cfacccde93eda8e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GXHND2519027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de37dc1b33ef6023e57519a177ffce063dfcd7620a5f6d4e15457712203e7b. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T10:33:49Z), 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/GXHND2519041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172110c2cd020ceb3428ae6d725541c7a4caa795b92ea85daa12c09cf5cea38. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHND2519034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d9ecc21e416365b2783897a54a2a61e5bbacc6a23183921d97d5e145f52fb5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHND2519038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9070360acc5c75f719738921dd53297a8fa45d521f2caffd79c2e2736e96ebbc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXHND2519024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3afa4caed6f0624bfd49ea5f37eea76dd285ed68fc625abb95fbe2f24f1306d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHND2519021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01479345d012d6e1083830b76c9b325ca3311c9ecc931115f1bebcfb1d90f67a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXHND2519042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcf54951cdb6b634522d1238c79bb222d9b34761c21c667b4c57c7cd8ca2301. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHND2562302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5adc8ee7e45d4e94eb12400c06d9ae201a5d094f21c9f0287107da722fc2a3e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX53U2620162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7ddaa262ae4cba506b5bbb601708a61b8dde3aa47f0339f7cdf5b6f40e836b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GX53U2621261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe3101a00bca05e4ea8c0803b840eaaa0a7688cf490a0618403d34fbd305380. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GX53U2620723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa9f1f64df45b30a4b6be0995580a34dc15bbab2ce46e8ef7144ab0c9826832. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/GX53U2621284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce47f927d8e83c2fc9b012ddaf72759b71000ae079e15613f9ca0cf8e42bc351. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GX53U2620733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08c8486ec659bcb702ed18e750fcaa6b727100e1a5a4fbaf00dc516bde25cb8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX53U2620129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c8cbf2236149c000dda59e6d270eec8d227942cedf352ba487b3c63cf0a88. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX53U2621336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc9c36c6b5703fa266df35f40df993fad83bd5199ceb935b56758a6ddeac242. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX53U2688015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d8e5f7113212dfa12f02988abd3e5a56ba008a7a8442a81d98229992bb9dca. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GX53U2688002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fc29ecfac9e6ebfa0eb24a0d10b9841c17e58d2d7fece342c0bdc38067f516. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GX53U2687998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c6beabe1b97340471282d45ec9ae716bee6503dfe6f95a8d6061db24b7fab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX53U2688020.