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 0x0dcdea41e70364ffd6f4a07b172a98cc9343b09e177a4975eac63f359e35ca86. 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/0cd4234b-d626-43a1-af68-ce7b421efab8.json and https://artists.proofprofile.net/proofs/artist/0cd4234b-d626-43a1-af68-ce7b421efab8.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 0x7a99134277d8301041a1e2a2cf2001c3a639cdf7da636a0940462c4cb5b347f9. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZNJV2460634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498cd0d5724a4341cf50ba82fb85b2da08536a3098af6de1be2ad10981275ae2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZNJZ2445078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59893c1bc25767767d865900e71b7d7e27ac17320a3de2a9b919d970a7185c91. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTPX2457509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775008d1b6031db224b8f57d16748e87e11dbc24d574ce0d9b1c2d965eaa03a0. 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/QZNJX2488569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18880bf17eeacebf867766adb91f97706b87715243f01fd4eb0a83b36dd4631f. 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/GBRKQ2534685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce943937117ca7f8fbc9cc8adc7f9dd60abe9d799cca9c95e989dd3b162a63e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC8182500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dac82a90ba21f28a144b70d82ab0d053eb72f203c098f4802949b6e5b4af2c. 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/BC8182500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b451a7297ed743bbcc06aa27501c45e0bb8eb1a0e1730c91f536da31f5f18. 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/BCI1D2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13959173101c8ecb390c34540bbc5042bedccbc5474a10fb5f46a7b6ef122ff1. 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/BXTRN2400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e7d3c9b5a6aadbcfa36f17dd5cbe32d91e72379cc49a552cfe0358f4cbfbb9. 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/QZW9M2443320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad631069d6854472f2e6211e246bc7001a2e888225856b6e041e8a73eca9fcd0. 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/QZZ8B2468408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf7a14189327871ba44f2306ed34d5fdd6bce034885563d0fe7fe5e715dd421. 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/QZW9L2415185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6532068cac2301ee4b74bded3d9ca33f388f028e60f8f7fff81acb83a7cc6685. 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/QZZ8B2422050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe429ec8052db649eb9ca38dbb5c7bfedbf3f6aa6d6cc3692b039a554c6accc1a. 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/QZZ8A2460299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd934c3063937cf4817e580cf42243a5a3c666553a106ecd3488ae9ef1eec074c. 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/QZW9K2423872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c111439e0ee76701df210cdc151cfa99b4dc0eb545fcbeef1866a8435fbca5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZZ8A2428109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875edd2be01d3acb790e4226104ec8fa66ea8549cfbd4d956585ab09a325a42. 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/QZTPX2449025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844566aa15aa2d69525634d6eb4f83b1c8883ae550d07d4bc880700c6f0bd30a. 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/QZWV32476245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ad7f73b1c244c85f34d67fac2118e2db6cb44a6be107d44c6f53bd0bf9aa3e. 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/BCBV22400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52bb02db8532533d858ebf295904a0b9bf1a2e4e02b07656a3cb95bf017de73. 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/QZNJZ2405055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e37b086c8166ec43d6520353bad935abb56e810acc4d7d24429cf80464f371. 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/BKCMX2500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64f3b6fa1a1225504a53abee3f581b138b4d56d2a58b55cfbb7cc6eec2e3e17. 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/BC8182500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52c883557c01b213e4d2a607239d4086f635ea6c270e2b7f5d6b86d6d95039. 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/BC8182500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad577a700f1d3b97d902f97ab1884425b90df94d5c75b797350a2ef56d5304c. 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/QZMZ92504329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6435f1d854bd67034ea29ba7355cda1f9bbe4dbfe8d7239f3af920a6081b25d1. 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/BXTRN2500610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1050fbb004270b8997eb7bc68049695c70b954da9ec2771680f9d87ae4b69. 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/ESA112562139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa49f2be031d49025d031965c66bc114a72b07d6794b4ad7afc84d7aff4d46ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC8182500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186eb1dd669539ba167b130b7a04e7512084bdb50400eb68ebd1ac3c724253e. 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/BXP0K2401142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafad3ef80e83bdacb89cdab2973460914172b37efc3b9f604fe440ee93300995. 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/QZTVM2295652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe341cec17824982be373dc051e0de18431c6214554a94e81f09cebb631750b38. 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/QZW9K2341175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2e014e1dba4438ce77a478877cce9f208ec74b160e47ffda271a51b671bdf2. 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/QZNJV2462091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c9a9fc252fc3f7b1bbc2e00d0eb7cfee41f896532441f038b7dfe86e9e4436. 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/QZNJW2409201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877fab03f68f685f5dadde3f4a21f9762f610fce0d4baa1529ea1131908fb178. 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/QZ5AB2442871.