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 0xeba6368595eccd46de00e62a426f30cfc307cd9d0db91a0d689616eab6878591. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aef7b0b9-9e59-4015-aa0f-cb4d55850a65.json and https://artists.proofprofile.net/proofs/artist/aef7b0b9-9e59-4015-aa0f-cb4d55850a65.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 0x8482645f31de5ddd52eb1117a6a69fd9d10cf7d97e4ff588853cb2fc81222bf0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/AEA3A2443564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353f3eeb99cb5e216ae7b8d411bd039a604dd413c32a869d60a40d69c931b2f5. 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/GXD7V2299855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc24e08c815e9219bec33c8ec2a514c9ec3e2d4045467f079e2fec617a91149. 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/GXD7V2549534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1456e74e8d88a57a194226b45d19f392628d727a46f2883e1c98d39a52c5aa5a. 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/BX4IU2501288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb698a02595a13a527416871d1da41846bd7dac942b2ae5b4a96faf753cb8a1e. 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/BX4IU2501284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bb18197530a356c003ba9806ef7097e8698ddb868676fb504824acb1937035. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX4IU2501287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b3bf416c143a708038103d1b04e3e9a0eeea57b696134cf36fd4247f4ab0f3. 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/BX4IU2501282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bca926cfad20c2782b4e5158d99e77d2219fb4d6811442cef103d0584625b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX4IU2501285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716b98a6ec46e84d15d61ab1a1f7d39b08915594f7f5f6740ab5981bb3df69ca. 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/BX4IU2501280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe1057db9915e5c6d8ac84ce37233f56317a464b412a1b7edde6422aea72306. 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/BX4IU2501286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c73993735e6dba1152895583ebe82dea6bbc022318ab6faa27010170726b8a. 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/BX4IU2501279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c73ed80da554d516357d6e1a69084cac9e5d6db2b692c70e8b995aa15322cf. 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/BX4IU2501281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e3cf57d59224a682c2ec49ce67216601ecb9cdeef947a6e8249d1a692c6478. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BX4IU2501283.
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 0x83f6ba725845c094e491eab0f115bd2588508484f0005c8d4d9444e64e53ad57. 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/BX4IU2501289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1229585721c70881e6e05f97879ce549106e18835d0ea188b068fa67208fb45b. 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/BXIV82473285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98adc4baa3113827090210edd18d1688feab39e0dd90f9d610e64a49b82a7ef4. 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/BXIV82436827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2205f42bd3abd01cc82c4aca4fc3c5e90e6b18d90cbabad67d17ca87e286acab. 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/BXIV82484502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2223f69dbd5d0c52b86d21387dc49c9445d2f5ce948e7390f23de272ebf9f501. 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/BXIV82421237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a5c19747709782664ca10142ab9ee2ef8e19f699cf775696f0b04e129e2ccf. 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/BXIV82438526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966661598fd497345840c611d945202ada3a18fa9a0da31e32b0aefaa38add8a. 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/BKNU22500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89fba51aef404c522fa32f713f1777dc2029dd03c3628e3379c075b3eabb17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKNU22500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc25d0b32414ac90e1e064601c763ed081c0a4450308754aa81e71f75c67ff. 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/BKNU22500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b0249a27f4c30b045c53d773fa1f5f5d38ce84db35287069e070c3d7fcd826. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BKNU22500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6ec105bdfd65fcf638c2fb7dec39e47b7e2ee5fc312e252c36218f936657b. 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/BKNU22500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee9e5b0338b6fcd39b2598bc4a3b65fd6469949e8101d5491394bd4a97beab4. 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/BKNU22500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14151c1656bc42ec6bd31bad6f0834b64678dfc859bff3300539fa4bda7596. 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/BC6M22404313.