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 0xdbdea8de775b1a04333dc12fde547bdf0fc209a16755160b0f6b296229935609. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f32ef26-d6c6-4cf8-827a-af7a1f72a8f8.json and https://artists.proofprofile.net/proofs/artist/0f32ef26-d6c6-4cf8-827a-af7a1f72a8f8.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 0x547f48213ffd04f1b9126a97578c3b9e7bb5cf5fa43655d45565da340236356c. 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/QZ2L62200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ad2e518ec440613310afb85d55e71ea54c37631ab1dfa519d3755754a57b9. 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/QZ2L62200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ad2e518ec440613310afb85d55e71ea54c37631ab1dfa519d3755754a57b9. 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/QZ2L62200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6133d6618880ad4d9aef56df7ab73a31b4c34b52a8fd8668ccdbcb30b47ff5a3. 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/QZ2L61800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38a52aea953271c67ff06738435385db2c89cb5a23ba2e7d108c27ee15917ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2L61800102.
Big Crown Records presents Crown Jewels Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0002d3c23a94f9b723355d9e5d58f7cb6ad95addfc45fb8f39371f97c0cf2da1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZ2L61800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3f4d35fdf9517621b3b4a3a29f97bad1bcec36e5cd83015bedc5f6e5f80db4. 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/QZ2L61700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6c47b39e89d428adfd701ebd5f2d9ffcc45d5f22ab506729d5165c0c743638. 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/QZ2L61800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb687cc20be048c4bbef02f9bcfa75fdb3ce9cae4cf48da3331551b3002f02. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ2L62000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c6969890d09c6546b8ce218a9bd3c0bc52e2ba393991d45f9b6a8414e8126e. 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/QZ2L61900196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce22d44f1316d344f1818423fa3a4f481c77d03f308085ec335891755fbbce. 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/QZ2L61900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046eeebc8ebb9909fdf1e5260f2c60c08c3be749bceecb5347c616924f98f801. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZ2L61900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f4eeffb9b16b436d546584cb52a58f437019ff69a5e7b31924a731a18fa13c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZ2L61900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38a52aea953271c67ff06738435385db2c89cb5a23ba2e7d108c27ee15917ed. 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/QZ2L61800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5299e54cbce67a4ececb40c07f059fd827acc5643d55fbacb879cdccd7e0030c. 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/QZ2L61900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fd596a9db56cefb224bec5e3e26ca8ef5079e988cf72835477901ebb9c84a2. 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/QZ2L61900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bb4e03e321c8d35bfc23a2da66079113f52db3f844ed51fe4da4c0c7cbd49d. 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/QZ2L62000090.
Big Crown Records presents Crown Jewels Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc0affcd6c9cc2a39b162b99ed6608853382c708330f00316951d4fedc05310. 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/QZ2L62200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a66417ed4615f0415735f854b631c966892624c0e7021290be9b5454bdb8501. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ2L62100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071ae8704d0328720c952b83276a5d4054be80f35814c6532fd05432a1385e6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZ2L62200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb141be13b9dff3db937f3064844e2759972525e0a94fcab27206800a4df61c76. 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/QZ2L62000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e38d02ba5dc71d7b48f7f3fadd3e355ee6b6111704ab1922eeeff1506934878. 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/QZ2L62300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfb1a6f1d577fab22a6edf4d7ff04f7751699e498e7510a3151aca1597c532. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ2L62100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654cd59ee472444c71956178a7d63d8794a4f6122eb41e66930a07924894e66b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ2L62300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061212b01b3de031accc74331868cc06b8774e4356678f861be8aae1341de469. 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/QZ2L62100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0728377c5509eb7f22c2806c66f57ba10b070586514ba0e2b084013a2f0f12. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZ2L62000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90c90a3b39c5e816e16cb47bd92e64c294870c65df898930e2a3d0fcd4bf80f. 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/QZ2L62200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b11b562d3e9b1460eb345d43e83a427601ddd34f190948d552a12f7dc3000fd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ2L62100042.