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 0xb2ef416a19cebf231aae6dcf90590d925053b630e1bc4e7e8bb8d4ef07581897. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4897bb1f-ed78-4059-bbe5-e9c6206ba5da.json and https://artists.proofprofile.net/proofs/artist/4897bb1f-ed78-4059-bbe5-e9c6206ba5da.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 0x713f447bc54d70ae8a730ad9d86682e6565a0e3b905aec8b230eae908b1ae3cf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DES290100035.
The Shadow Of Your Smile - feat. Chuck Loeb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1931d26f917ef04c9516d4cd2c3fb8a277f82bae8700d804fdce32c0d8226dcc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DES290200070.
Tell Me Something - feat. Nelson Rangell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e906c9c4a3a88b3c24a86b48568a6f8471ffb51069700b65270113acd4257d. 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/DES290300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c49b3b611ba66a8aba0f1d72f632b8876f9d591b34925b77b798a732666b3b. 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/DES290300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033628c3e3f2724f53c372281e56ed999f2c98c388f0d383032709939886836. 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/DES290300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3895c1741c48663d7ebb6e262be5f8c2956e34d425a91d3490024b6e551f4c8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DES290300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4b5400be9cec6364aed858a77d0f261e814fa503c99a2e2c9c2d44ec48b4a. 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/DES290300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20737436ce636e99adccd7e38c666890a422e90ee37b1246ed424e2ef65a78. 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/DES290300070.
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 0x09bd96ac00d6af304dfd058919fca0a28c5757b3fc11df60a334b8dda33b518e. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DES290300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b94212eeb535dddecf0282a8fac249620cd30820c657aea96d30749a04049. 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/DES290300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e28f4c8d03d982efa9eab97cd9cc551e2c31bac80c63fd8173640a72964d82. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/DES290300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc683105bfe2c1f11df2b321c7f352d7e99f497b3a3816b7a282aee2de27cb61a. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DES290300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ae808f2de4a7f1b58db8133bb7c666ed40f32fd5ddeebe91a8586c06e3ba1. 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/DES290300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d8a7e2bb4d6d20a6153b84391d1594afeb3385c971f75eae768cf167575491. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM20761665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1a3df5d7c880eb13da93b082273f3b0d67e98b9c27c087a7439bd850d3c73. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM20761666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541028b0a0344d85ffbdf53f7d4522e625a85db00e753f17ea106d9ce8b8318a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM20760826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4d283cbfef68b32538448c019b2a91334867cfe746252e4d25efb3d1ec4b8d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM20760830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aca20523f0ee4035bcf48d9e74c4f7679202fbb94a8555e1ed5901435315e50. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:30Z), 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/USHM20760831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d93e7c585ef39be909e309f61018fe5cf18d62a0e5f7eabd980a9d06bad4b28. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DES290600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd09dcca2219174401f24b11e8563022f165cf45d83e971ca42a2ee9835a3ad7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DES290600046.