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 0xdb309eb1eb3190d25d9fb7eb2cf8fba2ad93c22c7eef54731e85b1445e194912. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/daab013f-5110-4a5e-a9f7-22f2f7ad08fe.json and https://artists.proofprofile.net/proofs/artist/daab013f-5110-4a5e-a9f7-22f2f7ad08fe.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 0xdba7efb55edc5dacfa613d830f0c0a32dc47bfa24c3eb69f792e7f383142450c. 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/QZNJZ2575957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c245138d4c84c9e476cd095144b72d206206317afbc5f98092a814b80b6e8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2575942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa595861ff3887df367aa8285579eac0c9d3203e74f045f62622daf2677f70. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJZ2566978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65545f4cd99ce4eae79476b5e64283df7d3651b819853de6f291724b6bdba294. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNJZ2575927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5167c0563cc49bc8819079442c5de7b2b4e14af06b42f2aaa4d342e6dea306c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJZ2571980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cf9ebe1202130ca96071354c190d9a84724532e676120ca5031042bb49cf80. 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/QZNJZ2566440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7988e0360e2cdbf0ea7c6a1c79113fba83541bc2fbd401a6b219d5c65c5957b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNJZ2571905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d0b5e81dd4002aa0522a7d65115d09c0fa978d9f2200540bb67f07a4396cdf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJZ2566445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373b8daacdd0cfa2614bcfd06ec7599907bf89368883d0c0a98e1a900b2c7fc3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJZ2566416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81871836dc393ebd142865431f8eb290d30fa2090ad1d5f09980d59c40e37c79. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJZ2575924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ffd7d90a3f58d36f213cf13738d416560652412a8d77f9ecaafb8fc4f59daa. 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/QZNJZ2572088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b0366eed7ff881c7b0596ce770ea4dde1fe02387f2cad087454b9d1f75bed5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:38:24Z), 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/QZNJZ2575881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bf9f4cf32e36216265afd11650b2b8bb97b656605e7955bfd3334ae791c39. 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/QZNJZ2572077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226f6b180e3aee6d8906423c59702a8179437823b9ec68c23eb2c95ce263a88f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:14:42Z), 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/QZNJZ2571911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941119e4ee67eb11396132436b9508752dcd6924448c3727b0ce41b76fa3d9f2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJZ2571768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa711b57587a95e7e51c7f9ec33a377395a67b20823ed24394f725cad8207a7aa. 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/QZNJZ2571910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcde6deb586f146ac6d74e3e833746c0d66a54fa397f5884c5788bc8b59c4971. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNJZ2571844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fdefc622e2ba637a894523fd0715a99e1af1d57234121f29af17184878feb9. 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/QZNJZ2571754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2ca87cbf91f484b0b0836772f4b21de166e51a92b6f4a570b966bb90580b2e. 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/QZNJZ2571762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa252786236589045bd43dca65279fe6013dd29ca18353d3a80b66023255be60. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNJZ2571767.