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 0xeaafac5f3210855be065a197f14d35c3ab538b1954c385e064a31a0d1c2885b2. 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/5347db88-fac7-4faf-bd9d-9665270838c0.json and https://artists.proofprofile.net/proofs/artist/5347db88-fac7-4faf-bd9d-9665270838c0.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 0x71b223ecdc6b694e8f3baf2966de21e4358f8b7e7458aaa58f8781ee16463709. 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/TCAEU2075544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cc42487489fafa798c3ceb9d264407a1e698ff296fe41d73f173ed2ce49a36. 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/TCAEU2075471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51791046c7c1458c81210a7a506322466213904c2f4aff073382f86c1ab42f5. 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/TCAEU2075480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b925975409a927c5f821ad6ef53f3781df163ee1e8a10bb444b9989756255a. 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/TCAEU2075584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bc4e76a6ae959e7ac4162bcc7cd6f0936720a35ec98c600476fbb136cd11cf. 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/TCAEU2075453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816e955d6d6cd50dc1eefc8373da5fd958936ab82733a76a86d8f97d008a3efe. 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/TCAEU2075486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64f0db773e715d76a364a88c24a28e90d98ed7c5b630289ebbde6b342ab2240. 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/TCAEU2075514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa660a7c12a9bf7807579cf7e92cba46641c13fdf3ce851773b911b80f4e8b8f1. 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/TCAEU2075579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf886b6f3b7d80f339d45ecca8ab1a11ae344cb94906fcc5b71598b525c55f38. 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/TCAEU2075463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80821a0e2fd2d6f3cb6cc00af327a2f045395077525cf7942e186b207e8fde5d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAEU2075437.
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 0xac8a08b53189913cc1aa7bfbbf3559d7ab8ff216b00388212c16d88cd2a2e8d0. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TCAEU2075493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88769f68c6b08c02d1ec12329c3d8c7505b0f28db30a23e91d8a78a9289594de. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAEU2075839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5977eeda746ce964ca65e6fc48d583bc794ab83734face81857bcc1f4b4ecc06. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAEU2075477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f70f160a971694507c39e97127b0a1cd05461fb5458afba8b4178a70fa1b4ea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAEU2075499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce84a7cf9055bd19937b93157ca9f900e705a63bc62f6686c379abe5915994. 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/QZNMW2182266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd2cd510f22bb458892bcb215ecac49b402a5269cdfa3f601bdd8e08fd3094. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNMY2199207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f2596ee51fed840bded7f0ebc806c6647b3662759c937e6ad322698f38fed. 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/QZNMY2199208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdf616bce326a73ce04600fd31160a40306677d05e54bacff57749a90cda26b. 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/QZNMY2199209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d3aaf2adc43401092acc274a53c4383771b35808b888778f9a62b7a5acd365. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZNMY2199204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d72633986721d0462ee26bac73daaff7eb68c4d1c5d444f9b3a0461c7128cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNMY2199205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9da9b97f7ce615fb8946c8a1419664a94e4f4b93ac9110104ee822ff4eb7d8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNMY2199206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d75d0f72085cd1a62631ee8677d9e5966835de907be6c0fa5618df2ebea4b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNMY2199210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de1e9044b3af448e4b5ad027d975d252d4c3d8e1c5e1225ff126a820631fa74. 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/QZNMY2199211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339807c18336cc8fddb1bf64297aa0afd6c2ae202d016e6d083434cec2e8ed44. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNMY2199212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28875a3ef01419c60a236718244b57f4e6b77b340e6fb8f7749a6b2d21e777a7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNMY2199214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002b1cf2c52a668c9581b5564e215e5c55227a661145e49940f36d0a7700a4ac. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZNMY2199216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a3e148d1d38b2140c7b6ffd6519f72d485ecb287e58d31fdd75cb4e857883. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ5FN1885367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7819467aeb35761ffae714879322efcacef46edf78671c5937dcd09ff46ecf1b. 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/QZNMU2154896.