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 0x8eda3dbee27c18975b3326839db63e404dd0ffaf3b21708a624548fc4762b078. 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/ebd6d77a-65e6-4b0d-a229-e08661051eb7.json and https://artists.proofprofile.net/proofs/artist/ebd6d77a-65e6-4b0d-a229-e08661051eb7.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 0xee9d40f862cf5e42877b123b491c3242df98274a69c7c20fc3717af33112719f. 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/GBMA22561118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3981458bf362ff30d26049f3ca14f755f96b8255f34deb625fc92c44d948dccb. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBMA22561119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe648748ca3ddcfed2a5282380123094e3c89c001141ad589fabfd32a85daff5f. 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/GBMA22561120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0acc871d3a9b5384b6700cd9e6b967fb4a4f62cd6dc0e867855e4fa818af57. 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/GBMA22561121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35972ce17260dfd28e52cd543b4ab5a4fc19f1b0d8d2bf2cd8332e940e64467. 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/GBMA22561122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d0d2c0d3ecb4ab520b60169183b7defaa9c348f2a6d5fbad3c196fb96aed78. 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/GBMA22561123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa3aaba6e16883d5d081026fa449cf95022e8f01405b16aedb7348bdcc7101c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMA22561124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7730e450eb6428ad29cbc5d07896c50e24f23b2b51543fa8b199cf16ce06d3e5. 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/GBMA22561125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc71e25444a8d1b021552670c4c1166ce5858cdab26762c9ac30e929868d39f. 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/GBMA22561126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c61508affe620ec76fa5831d7264c2559f56cbeda17e7e0e58d1683f27e1a5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMA22561127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89a33ed03c1e16881b1942f7ad721300bdab4bab2459126f5c986c48b5f7425. 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/GBMA22561128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bac86afb0808704952c61cb3b631351ad71dca0bddb76225f3a1bf1bda82fb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBMA22561129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89180fdd5038fd0c537dbfd672c15a01b6bb06d1d51ece03cf3b67c814e14ca4. 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/GBMA22561130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55649c29d91340d482b2fa14896959629ebd41ecf462497022b69d9ace0254fa. 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/GBMA22561131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd44619163e55e77cbc0c05cb524683570ba49338c2c314e640355f9f5e81c53. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBMA22588704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a8ad5136db228f02f22afb32533bcd1a9fe8cb7bc9580a3d815495cbfa8154. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBMA22588705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0722307b7828c23d754a604c4696d76482e23dbd1c6fdd976c6d7eb315215461. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/GBMA22588706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffe3c6c84e6499e357aae5b5ed410a1461e877ade129b11cbc352239c542e00. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBMA22588707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cbbef73f42a5ce6e583d93020a0c788bda0d2f789d866532d153435fd7d505. 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/GBMA22588708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08a239428b2b981392d31d7420a3e7f01269250b3d2526e06feaa7751631ae. 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/GBMA22588709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccee72adffb567b5ff24f7098febdf91a91d63c9389bb4c7ad947d2e6d4e2d8. 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/GBMA22588710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ebb4b0a6788b70d8470e8e420b612b0f325796c1df58694a8085619bac3970. 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/GBMA22588711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a93898c60b82815b79b3bcfc43483e2eb4362c3dc12f94837cb70c4876ccb4. 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/GBMA22588712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ae6c48f201dfe0782317f4615bc573938e041d29232ae9a8f5959726b508f. 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/GBMA22588713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede9cacdca7b6694e5885f36815ab9862574017f803a63005d9441d4e224fd86. 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/GBMA22594032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe10d5d8c22753b8f8d9fc787008c29a6cdd98ef25b1a2f1ba169faa6275e826. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBMA22593984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe96b9fc1ff23c1bd3d31f6e02c5b7f179607c3fa069f8d6e0035fa24b2973ae. 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/GBMA22593985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65011ea1ba4b130fe9b8a3c3b30f9bddbad69d99a3ba76076d59aa063a75766a. 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/GBMA22593986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7597a3cb88837fc0410f12192531378c03c5d2dd018dc26a66c0425e1f9ef9. 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/GBMA22593987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5839f5f3c97fe325b4641da7118b4620771807e032d9512870ba14be0a0107. 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/GBMA22593988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db77040307bc35de487797ee4ac175f25ed6f5e0dc500ad2e8c0fd5d172547. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMA22593989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f19284b58b72fdf8f7d9a374a137537084c39fac07993eb41243e32a26c778. 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/GBMA22593990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033375f194af405a212a958db1e3998eaf753eac9b03c502a610ce2917d4f08e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GBMA22593991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846706f1dbe39ab88eada643703817f71fd3c9ac682a5923dab8b3d33595f7da. 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/GBMA22593992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7309efeef369ada5efcfd4142aef2433cbefefa692c5e24f2a183d16565bdbf7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBMA22593993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211c37f7e22d3e23be6138c5c55e14eb15ad9459579015bae4168794b002c950. 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/GBMA22593994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65b66278d852e9ea948328992a9f442feb1b366b43f3feadb4da304fc8709e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/GBMA22593995.