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 0x7ef441290f60b197cc7d54c4334b6c5fec6b01895f5f991ae20840249805a227. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8376ba8-09dd-477d-9645-05af55adcdb3.json and https://artists.proofprofile.net/proofs/artist/b8376ba8-09dd-477d-9645-05af55adcdb3.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 0xe173ba434f5efc083942b918890c1af434f6c2453cef4a98eb1383d73fd83b31. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRIVT1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058eb29b7ea4ac93b5fc28f1aaa22f42eed2cde3bb6526ac58a201cffb11023d. 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/BRIVT1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2cdc613196850943dddfbe93c1bf16a97bfcc451ced74c3b6fc1c2b0bac92. 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/BRIVT1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef16a22474084c68c1d2b7b46f463172e0941ba74913fa6a21da6716d8dd3b7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRIVT1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e02f35aa446d21b13396b34cbc3eddfbed82ca8df21472988e82cfb15dcc9d. 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/BRIVT1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd0572cc124e5c7cf8e6236dbb88e03a33979111f74cda152eb495a71a628d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRIVT1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfbc526068b75e8c51e45340c3551d3c4bd79f9a8a5abdce06e5c89e3b9fa81. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRIVT1900012.
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 0xa728143cc622cc76f63930c78f52788e441a631629bc00ad224cfe880da36693. 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/BR04C0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddce3fba248e8cf7c968e8eba3b0d788cbb3e0ff8b9ff1e9ed5d488c5026f85. 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/BR04C0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d62094c8ce51a00378b98c4e8544ca6d4d25acf59b18cfa68bff86aa145ffd. 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/BR04C0700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf521c01c28f008c1a3e80eeae9fce13a3e258ec25c6c193d376566cc6e12ec43. 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/BRLGW0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4136a94c70a605540449e8f866a870d9b6a9710941c1488e0f9441decbad6e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRO171400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a80f577566c91ae0850dba20b079449b109aa171e8ba26d4865194636fd7a6e. 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/BRO171400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5863d53474a2e068c1f406d9a2a78bc422507e1bcf26f7c51a324ca6acdd3945. 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/BR0171000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b55e400890329ed9e8cc1787906fc33fab26a86377eadf47113fd7884f52cf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR0171000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9ee5559213d1fc9bed203d6cfc6be72bcc667bedd05fe24c280c5ddc1a3c84. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BR3LE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05049f8e2c942f2230c584409d8c2518fa79d6e09dc4e9ba97a2365209860923. 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/BR3LE2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5b51fab3fd0142c8dfce0e819804b7d9b179f34ac20d1429ed818fe574b4da. 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/BR3LE2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80749591f1bcf4071948033cac9c7274a1c1c611f093ff6bf6b9f3ecc4a5cb6c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BR3LE2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a9eff24d24bb4a6426fcee56c557c72a04246763d66e229fa7ce37891065b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BX1FC2400001.