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 0xb2e046632839895199b243d50f409717df60cbe36ab59708b393bed34713c207. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/156bad41-bbf3-4a18-b9ef-9a853620b0f1.json and https://artists.proofprofile.net/proofs/artist/156bad41-bbf3-4a18-b9ef-9a853620b0f1.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 0xefd5792912371dbff522f29ef0b9e28ab8e8f2138cee149eaffebbb2c6338f6d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBUM71507326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5766a080183c211faba8603bdf48813f0497336e14fc085708eb8ebe0a47acf. 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/GBUM71505736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6378520450f1f47ab80562a0dfe5e278b7f26d4bd550bf225feff0b0f7bbdd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBUM71507327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654664529a52ab3568ed795322d581b5b64d02047e55d9ae87f62a1ed126fbe0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBUM71507329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d921a8e7760cf11f4c1500ffc715609e87fdef6e3d7aabbf52ba506a62f3775. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBUM71507330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90211d5ab2360dee269e86d762f68b2cf472cfb9fa90064ad270e9305dba1043. 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/GBUM71507333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb593d679986f205cd9153bbcbe0c6a6adde2a854b95f0a9eab50bce2cf2bc0. 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/GBUM71507703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5da16df808303ec448b32e51028b693907d5e8995855c04895c781f711fc7e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBUM71507328.
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 0xdc5c46d163ed4db163c0cdd137fd09a633af79ca608bd674e35ae71c3434ffad. 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/GBUM71507331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84210e3cd39fe16385fcb332064f3315ee5c4dbed72a7d67ca68214cea6b4260. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBUM71507332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d95019ba1b45fb23e0738a484c2a2a76ab27453fa17ec8fa888cff6234c118. 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/GBUM71507334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd236fc8281d67a95d18f940f5397a66aa8d6ded6b8d8e76c1965e6647f8e24f1. 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/US6R21364131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3222545719a60b8ed4d77e717b927d1e848c1f9e0e26a98838e3fcaba27879. 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/US6R21364132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ed4e7b77ef62c7ff6831886343eb61440c251efbc052df85d9176a20ab25b. 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/US6R21364133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf57213141ebb583f41ae5fc11c497cbf15f4cdf176807e7c678ad83801ac8f0. 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/US6R21364136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761df59d2d597f37db2e7097398929e43651669edade75ddeea2682bf7d0fd4d. 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/US6R21364138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbef094c2f44580f591c0a2b2c59204be6c09dd39be7a979f9512b5d63cb431. 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/US6R21364128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f5417092ae88483d0ea5394f95019cd6cd4e79975fa1a075cbea5321c82bf. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US6R21364129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b591a69413cdd939f377556a331dbd165ac0129ba7166a4dfca376ed9bbe19. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US6R21364130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e03d27d9832a7ea73200db6a1dfb0f1378e30ea3949608b79d12e1a6d99044. 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/US6R21364134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df29f469921eaadcf32b491933656b6249016161c71e7aa433ede352d9ee5b6. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US6R21364135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8d9e993cc5a1561691476330490e396cec2d28135dd7cc8a580bd678ede8c5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US6R21364137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd480d1bd4ce5b162540e027fb9b6981780d456554c827e8af2f62a994161f1. 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/UK8TV1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530bf7d3ad14c0a9892d3b685cde692b4fd6037f1ea58dbba2b3a0355a99132a. 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/UK8TV1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87eaf3633c3e6a6c2b7a8903249d85c6be0d7bccd86cb6d671736892e6a75be. 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/UK8TV1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb029d96e2cbca44891db6cb8ac8fd6c1d06493ef272607cfda25e7ab88030049. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/UK8TV1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fda4ab789ab77dfdf48cf23612457a17c0fc4beb42e01f0fc7734d07d38aa87. 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/QMFMG1331900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823167bf836a907a8f669199ff5a1181cd937c3f294c94f481d54cd66e5a091a. 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/GBMLU1371661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82b9087181c900938bf80887550358fae2501870936ebd1fe6c8b29bdeb6bc. 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/GBMLU1371662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee783e01329ce66de8bc2ffd7840039afbb7f3f780cc49cc9ea3743a2535f977. 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/GBMLU1214704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc6de7adac83b45ed74d28101bbd870ce184ab25e167c601d87c96615b565f4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBMLU1214701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52620901153900fe2f16bad93e0027ac4319e64a8c9fcc30a5c61ebd42d73d13. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBMLU1214702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcae34a3fa0004b75fde6c0c31fe3de7a407908ac4fa63190644ddeb134862d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBMLU1214703.